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Class 7 Science Practice Test Online

Class 7 Science is all about looking closely at the natural world and understanding how things work, covering heat, motion, electricity, and light, acids, bases, and changes in matter, and how plants and the human body get and use energy.

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Reviewed by Mallika · Science Faculty, GV Academy · 11+ years teaching Class 6-10 Science, reviewed for curriculum & exam alignment.Nutrition in plants, heat transfer principles, and experiment summaries verified against middle-school NCERT content.

Last reviewed: August 2026

⚡ Quick quiz

Test yourself in under a minute: Class 7 Science Practice Test

This one moves from heat transfer and circuits to acids and bases, then finishes on how plants and the body process food.

1. Which heat transfer method needs direct contact between particles?
2. Name the base SI unit for time.
3. Which device melts to cut off current when it gets dangerously high?
4. Which mirror type curves inward and can magnify an image?
5. What two products form when an acid and a base neutralize each other?
6. Is rusting a physical change or a chemical change?
7. Which plant tissue carries water upward from the roots?
8. Which organ produces bile?

💭 Think about this

Can you explain why the handle of a metal pan warms up while the pan sits on a stove, using conduction?

Questions below are grouped by topic, pick the Science topics you want to practice, or swap in your own worksheet, notebook, or textbook questions any time.

Heat Transfer, Motion & Time

Covers conduction, convection, radiation, measuring temperature, calculating speed, reading distance-time graphs, standard units of time, and oscillatory motion.

📋 Quick referenceHeat Transfer & Speed Formulas▶

Three Ways Heat Travels
- Compare whether heat travels through touching material, moves with a liquid or gas, or crosses a gap without either.
- Describe what is moving along with the heat before naming the transfer method.
- Use a fresh example, such as warmth from a lamp, to test whether heat can cross empty space.
Speed = distance ÷ time. On a distance-time graph, a steeper line means a faster speed.
Oscillatory motion moves back and forth around a fixed middle point (a swinging pendulum, a plucked guitar string).

Feeling Heat Move and Tracking Speed

For Students

Write speed as a simple formula, distance ÷ time, before touching any specific numbers, a distance-time graph is just a picture of that same idea, where a steeper line always means a faster speed.
Oscillatory motion is one of the easiest motion types to spot in daily life, a swing, a pendulum, a plucked guitar string, which makes it worth recognizing before tackling harder motion concepts.

For Teachers

A student who mixes up convection and radiation usually hasn't separated 'needs moving matter' from 'travels through empty space.' Ask them whether the heat source and the object are touching or have matter in between before naming the mechanism.

1. Which method of heat transfer happens when heat moves directly through a solid, like a metal spoon left in hot soup?
▶Reveal answer
Conduction
Conduction is the transfer of heat through direct contact within a solid material, particle to particle, without the material itself moving. This is why the handle of a metal spoon left in hot soup heats up over time.
2. What do we call the breeze created when warm air over the land rises and cool air from the water rushes in to replace it?
▶Reveal answer
Sea breeze
During the day, land heats up faster than water. The air above the land warms and rises, creating a low-pressure area that draws in the cooler, denser air from over the sea. This is convection, where heat moves because warm and cool matter physically shift places.
3. Which method of heat transfer lets the Sun's heat reach Earth through empty space, without needing any matter to travel through?
▶Reveal answer
Radiation
Radiation transfers heat as waves that can travel through empty space, unlike conduction and convection, which both need matter to move heat along. This is how the Sun's warmth reaches Earth across the vacuum of space.
4. Which instrument is used to measure temperature, and in which common unit is it usually read?
▶Reveal answer
A thermometer, usually read in degrees Celsius
A thermometer measures how hot or cold something is, most commonly shown in degrees Celsius in everyday and scientific use. Some countries, like the US, use Fahrenheit instead, which is why a temperature reading always needs its unit stated. Without it, '100 degrees' could mean boiling water (Celsius) or a warm day (Fahrenheit).
5. A car travels 150 km in 3 hours. What is its average speed?
▶Reveal answer
50 km/h
Speed = distance divided by time = 150 divided by 3 = 50 km/h.
6. On a distance-time graph, what does a steeper line indicate about an object's speed?
▶Reveal answer
A faster speed
A steeper line means distance is increasing more quickly for the same amount of time, which means the object is moving faster. A flat, horizontal line would mean the object isn't moving at all.
7. What is the SI unit used to measure time?
▶Reveal answer
Second
The second is the standard SI unit for measuring time, with minutes and hours built up from it (60 seconds in a minute, 60 minutes in an hour).
8. Name the type of motion shown by a child on a swing, moving back and forth repeatedly.
▶Reveal answer
Oscillatory motion (or periodic motion)
Oscillatory motion is movement that repeats back and forth around a fixed point, like a swing, a pendulum, or a plucked guitar string. It's called periodic when the same motion repeats after a fixed interval of time.

Electric Current & Light

Tests ammeters, fuses, switches, the magnetic effect of current, electromagnets, reflection, concave and convex mirrors and lenses, and how a rainbow forms.

📋 Quick referenceCircuits, Magnetism & Light Rules▶

In a circuit diagram, identify which device measures the flow and which safety part breaks the path during an overload.
A current-carrying wire creates a magnetic field around it, the working principle behind an electromagnet.
Law of reflection: the angle at which light hits a mirror always equals the angle at which it bounces off.
Mirrors & Lenses
- First identify whether the curved surface is a mirror or a lens, then observe whether it curves inward or bulges outward.
- Compare an image made by a curved mirror with one focused through a lens before naming the optical device.
After rain, look for a situation where white light passes through water droplets and separates into different visible colours.

Tracing Circuits and Bending Light

For Students

Trace a circuit's path with your finger on paper, from the cell through the switch and bulb and back, to make an abstract diagram concrete.
See the magnetic effect of current for yourself: iron filings sprinkled near a current-carrying wire arrange themselves in circles around it, the same idea used inside an electromagnet.

For Teachers

Students often confuse a concave mirror's magnifying effect with a convex lens's. Have them state whether the surface is a mirror or a lens before predicting what the image will look like.

1. What is the SI unit of electric current, and which instrument is used to measure it?
▶Reveal answer
Ampere; measured using an ammeter
Electric current is measured in amperes (A), named after the French physicist André-Marie Ampère. An ammeter is always connected in series in a circuit, so that all the current in that part of the circuit flows through it.
2. What safety device in an electrical circuit melts and breaks the connection if the current gets dangerously high?
▶Reveal answer
Electric fuse
A fuse contains a thin wire with a low melting point. If the electrical current spikes dangerously, the wire overheats and melts, breaking the circuit to prevent fires or appliance damage.
3. In a simple electric circuit, what is the function of a switch?
▶Reveal answer
To open or close the circuit, turning the flow of current on or off
A switch works by creating or breaking a gap in the circuit's path, when the gap is closed, current can flow, and when it's open, the circuit is broken and current stops. This is the same basic idea behind every light switch in your home.
4. What happens to a compass needle placed near a wire that is carrying electric current?
▶Reveal answer
The compass needle deflects (moves away from pointing north)
A wire carrying electric current creates a magnetic field around it. This field pushes on the compass needle, making it turn away from its usual north-south direction, showing that electricity and magnetism are linked.
5. What do we call a temporary magnet made by wrapping a coil of wire around an iron core and passing current through it?
▶Reveal answer
Electromagnet
An electromagnet only acts as a magnet while current flows through the coil, unlike a regular bar magnet, which stays magnetic all the time. Turning off the current removes its magnetism.
6. What term describes light bouncing off a smooth, shiny surface like a mirror?
▶Reveal answer
Reflection
Reflection happens when light rays bounce back after hitting a surface, following the rule that the angle of incidence equals the angle of reflection. A smooth surface like a mirror reflects light in an organized way, which is why it forms a clear image, unlike a rough surface, which scatters light in many directions.
7. Which type of mirror curves inward and is used to form a magnified image, like in a shaving or makeup mirror?
▶Reveal answer
Concave mirror
A concave mirror curves inward like the inside of a bowl. When an object is held close to it, the mirror produces a larger, magnified image, which is why it's used for shaving or applying makeup.
8. Which type of lens is thicker in the middle than at the edges, and is used to correct long-sightedness?
▶Reveal answer
Convex lens
A convex lens bulges outward, thicker in the middle than at the edges, and bends light rays inward to meet at a point. This makes it useful for correcting long-sightedness, where nearby objects appear blurry.
9. What natural phenomenon splits white sunlight into its seven visible colours as it passes through raindrops?
▶Reveal answer
A rainbow
Raindrops act like tiny prisms, bending and splitting white sunlight into its seven component colours, red, orange, yellow, green, blue, indigo, and violet, forming a rainbow in the sky.

Acids, Bases, Chemical Changes & Metals

Covers acid-base neutralization, litmus and natural indicators, rust prevention, crystallization, physical versus chemical changes, and basic metal and non-metal properties.

📋 Quick referenceAcids, Physical vs. Chemical Change & Metals▶

When an acid and a base react, identify the two products formed after their effects cancel each other.
Use two litmus colours to compare an acidic solution with a basic solution, then record the colour change.
Compare the substance before and after a change; decide whether the original material remains or a different substance has formed.
Metal vs. Non-Metal
- Metals: malleable (bend into sheets), good conductors, usually react with acids.
- Non-metals: brittle, poor conductors (with few exceptions).

Testing Whether Something New Was Formed

For Students

Before answering a physical-vs-chemical question, name the substance before and after the change, if it's still the same substance, it's physical, no matter how different it looks.
Sort metals from non-metals by testing real properties side by side (bends into a sheet? conducts electricity? reacts with acid?) rather than memorizing a list.

For Teachers

On physical-vs-chemical questions, a student who answers by whether something 'looks different' rather than whether a new substance formed will miss cases like dissolving sugar (looks different, still sugar) or rusting slowly (barely looks different, is new). Push them to name the substance before and after.

1. What substance do you get when an acid reacts with a base in a complete neutralization reaction?
▶Reveal answer
Salt and water
In a neutralization reaction, the hydrogen ions from the acid combine with hydroxide ions from the base to form neutral water, leaving behind an ionic compound known as a salt.
2. What color does red litmus paper turn when you drop a basic sodium hydroxide solution onto it?
▶Reveal answer
Turns blue
Litmus is a natural pH indicator. Acids turn blue litmus paper red, while bases (like sodium hydroxide) turn red litmus paper blue.
3. Name one natural substance, other than litmus, that can be used as a natural acid-base indicator.
▶Reveal answer
Turmeric (or china rose/hibiscus petal extract)
Turmeric changes from yellow to reddish-brown in the presence of a base, and china rose petal extract changes color with both acids and bases, making both useful natural indicators alongside litmus.
4. What is the process of coating iron with a layer of zinc to stop it from rusting called?
▶Reveal answer
Galvanization
Zinc acts as a sacrificial barrier. It reacts with oxygen and moisture before the underlying iron does, effectively protecting the iron from corroding.
5. What is the difference between a physical change and a chemical change? Give one example of each.
▶Reveal answer
A physical change is reversible and no new substance forms, like ice melting into water. A chemical change usually forms a new substance and is often not reversible, like paper burning into ash.
The key test for telling these apart is asking whether a new substance was formed, melting, freezing, and dissolving are physical changes because the substance's identity stays the same. Burning, rusting, and cooking are chemical changes because they produce a genuinely different substance with different properties.
6. What method is used to obtain pure, solid crystals of a dissolved substance, like salt or sugar, from its solution?
▶Reveal answer
Crystallization
Crystallization involves slowly evaporating the liquid from a solution until the dissolved substance forms solid crystals. It's a physical change, since the salt or sugar itself doesn't turn into something new, it just changes form.
7. Which property lets metals be hammered into thin sheets without breaking?
▶Reveal answer
Malleability
Malleability is the property that lets a material be hammered or rolled into thin sheets without cracking. Metals like gold and aluminium are highly malleable, which is why they can be shaped into foil.
8. Metals are generally good conductors of heat and electricity. Name one non-metal that does not conduct electricity.
▶Reveal answer
Sulphur (or any non-metal such as carbon in the form of sulphur, phosphorus, etc, except graphite)
Most non-metals are poor conductors of electricity, unlike metals. Sulphur is a common example of a non-metal that does not conduct electricity at all. Graphite (a form of carbon) is the well-known exception, a non-metal that does conduct electricity, which is exactly why 'metals conduct, non-metals don't' should be treated as a strong pattern rather than an absolute rule.
9. What gas is usually produced when a metal like zinc reacts with a dilute acid?
▶Reveal answer
Hydrogen gas
When a reactive metal like zinc reacts with a dilute acid, it displaces hydrogen from the acid, releasing hydrogen gas, which can be tested with a burning splint that produces a small pop.

Nutrition, Digestion & Circulation

Covers nutrition modes, insectivorous and parasitic plants, the role of bile in digestion, and the heart, blood cells, and blood vessels.

📋 Quick referenceNutrition & Circulation Facts▶

Autotrophic nutrition: making one's own food (plants). Heterotrophic nutrition: depending on other organisms for food (animals, insectivorous and parasitic plants).
Trace which digestive fluid prepares large fat drops for enzymes, and identify the organ that supplies it.
The Circulatory System
- Match the blood cell to its main transport job, using the oxygen-carrying protein as a clue.
- Follow blood from the pumping organ to the body and back, noting the direction before naming each vessel.
- Compare thick, stretchy blood vessels with vessels that return blood at lower pressure.

Tracing Nutrition and Blood Flow as a Journey

For Students

Trace blood's path in order, heart, arteries, body, veins, back to the heart, lungs, rather than memorizing artery and vein facts separately, the direction is what decides which vessel type is being described.

For Teachers

A student who mixes up an insectivorous plant (traps insects for extra nutrients) with a parasitic plant (steals nutrients directly from a host) is conflating two different survival strategies. Have them name what each plant actually takes and from where.

1. What is the term for the mode of nutrition where a living organism makes its own food from simple raw materials?
▶Reveal answer
Autotrophic nutrition
Derived from 'auto' (self) and 'troph' (nourishment), this is the process where organisms like plants use sunlight, water, and carbon dioxide to synthesize their own food via photosynthesis.
2. Which insect-eating plant uses modified leaves with sensitive hairs to snap shut and trap its prey?
▶Reveal answer
Venus flytrap (accept Pitcher plant)
The Venus flytrap has specialized leaves with trigger hairs. When an insect touches them twice within a short window, the leaf snaps shut to digest the prey for nutrients like nitrogen, which are scarce in its native soil.
3. Which parasitic plant lacks chlorophyll and uses root-like structures to steal nutrients from a host tree?
▶Reveal answer
Cuscuta (Dodder)
Because Cuscuta cannot perform photosynthesis, it relies entirely on a host plant. It uses specialized structures called haustoria to pierce the host's stems and drain its food and water.
4. Which major digestive gland secretes alkaline bile into the small intestine to help break down large fat drops?
▶Reveal answer
Liver
The liver produces bile (stored in the gallbladder), which emulsifies large fat droplets into smaller ones, making it easier for digestive enzymes to break them down.
5. Which type of human blood cell relies on an iron-rich protein called hemoglobin to carry oxygen around the body?
▶Reveal answer
Red Blood Cell (RBC)
Hemoglobin binds tightly to oxygen in the lungs and releases it into tissues throughout the body. It also gives red blood cells their characteristic color.
6. Which muscular organ acts like a double pump to keep blood flowing through your entire circulatory system?
▶Reveal answer
Heart
It functions as a double pump because the right side sends oxygen-depleted blood to the lungs, while the left side simultaneously pumps oxygen-rich blood out to the rest of the body.
7. Which blood vessels have thick, stretchy walls to handle high-pressure blood moving away from the heart?
▶Reveal answer
Arteries
Arteries carry blood away from the heart. Because the heart pumps this blood with great force, arteries must have thick, elastic walls to withstand and manage the high pressure.

Transport, Respiration & Reproduction in Plants

Covers xylem transport, stomata, anaerobic respiration and lactic acid, respiratory organs across organisms, pollination, sexual versus asexual reproduction, and seed dispersal.

📋 Quick referencePlant Transport, Respiration & Reproduction▶

Follow water from a plant's roots to its leaves and distinguish that pathway from the tiny openings used for gas exchange.
During intense exercise, compare respiration with enough oxygen to respiration when oxygen supply cannot keep up.
Match an animal's breathing organ to the place where it takes in oxygen: water or air.
Check whether a plant reproduction example involves pollen and seeds, or whether a new plant grows from an existing part.
Look at the seed's structure or the parent plant's surroundings to infer whether wind, water, animals, or bursting could carry it away.

Comparing How Different Organisms Get By

For Students

Check any reproduction example by asking whether pollen and a seed were involved at all, if not, it's asexual, no matter how much it looks like a new plant grew.

For Teachers

A student who labels a stem cutting as 'sexual reproduction' is likely equating 'grown from a plant part' with 'needs a parent,' rather than checking whether pollen and seed formation were involved at all.

1. What do we call the special plant tissue that moves water and dissolved minerals upward from the roots to the leaves?
▶Reveal answer
Xylem
Xylem acts as a system of one-way microscopic pipes in vascular plants, transporting water and vital soil minerals upward against gravity using transpirational pull.
2. What are the tiny pores found mostly on the undersides of leaves that let gases move in and out?
▶Reveal answer
Stomata
Stomata are microscopic openings flanked by guard cells. They regulate gas exchange, letting carbon dioxide in for photosynthesis and letting oxygen and water vapor out.
3. When muscles do intense work without enough oxygen, the buildup of which acid causes cramps?
▶Reveal answer
Lactic acid
During heavy exercise, muscles switch to anaerobic respiration to generate quick energy. This partial breakdown of glucose produces lactic acid, which accumulates and causes muscle fatigue and cramps.
4. Which respiratory organs allow fish to absorb oxygen directly from the water around them?
▶Reveal answer
Gills
Gills are highly vascularized structures with a large surface area. As water passes over them, dissolved oxygen diffuses directly into the fish's bloodstream while carbon dioxide diffuses out.
5. What is the process called when pollen grains are transferred from the anther to the stigma of a flower?
▶Reveal answer
Pollination
Pollination is the transfer of pollen from a flower's male part, the anther, to the female part, the stigma, and it's the first step needed before a seed can form. This can happen through wind, water, insects, or other animals carrying pollen between flowers.
6. Is growing a new plant from a stem cutting an example of sexual or asexual reproduction? Explain.
▶Reveal answer
Asexual reproduction
Asexual reproduction produces a new plant from just one parent, without pollen or seeds being involved, which is exactly what happens when a stem cutting grows roots and becomes a new plant. Sexual reproduction, by contrast, needs pollination and seed formation from two parent structures.
7. Name one way seeds can be dispersed away from the parent plant, other than by wind.
▶Reveal answer
By animals (eating fruit and dropping seeds elsewhere), by water, or by the fruit bursting open and scattering seeds
Seeds need to travel away from the parent plant to avoid overcrowding and competition for sunlight and nutrients. Besides wind, animals carry seeds in fur or droppings, water carries floating seeds like coconuts, and some pods burst open to fling seeds outward.

Where students at this level usually slip

An ammeter and a voltmeter look alike on a circuit diagram but measure different things: an ammeter reads current and sits in series, while a voltmeter reads potential difference and sits in parallel across a component.
Graphite is a non-metal that conducts electricity, breaking the usual metal-versus-non-metal pattern. Questions about conductivity often use it to check whether a student memorized the rule or actually understands why most non-metals don't conduct.

Frequently asked questions

What science skills should a Class 7 child have?

Explaining how heat, motion, electricity, and light work, distinguishing physical from chemical changes and metals from non-metals, and describing plant and human life processes like nutrition, respiration, and reproduction in plants.

Why does my child mix up physical and chemical changes?

The clearest test is asking whether a new substance formed — freezing water into ice keeps it water, so that's physical, while a burning matchstick turning to ash and smoke is chemical because it makes something genuinely different.

Explore more for Class 7

Class 7 English practice test Class 7 Math practice test

Move between subjects in the same class to build a fuller revision routine.

Science learning ladder — Middle (Class 6-8)

See where Class 7 Science fits in the middle (class 6-8) years, and jump straight to the next step.

Class 6
Living World, Materials & Simple Circuits
The first year of middle-school science: plant and skeletal biology, sorting materials and separating mixtures, types of motion and light, and building simple electric circuits.
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📍 You are here
Class 7
Heat, Electricity, Chemical Change & Plant Life Processes
Class 6's foundations get more technical here: heat transfer and speed calculations, the magnetic effect of current and light bending through lenses, acid-base neutralization and physical-vs-chemical change, and plant nutrition and reproduction.
Class 8
Chemical Effects, Optics, Life Processes & Environmental Awareness
Class 7 covered heat, current's magnetic effect, and plant life processes; Class 8 adds the chemical effects of electric current, the physics of light and sound, reproduction and adolescence, and a first real look at conservation, rounding out the final middle-school science year before Class 9's more quantitative approach.
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Understanding why things happen, not just what happens, is exactly the mindset Class 8's chemistry and physics topics reward.

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