Grade 7 Science Diagnostic Exam

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1 / 25

What is the function of the stomach in the digestive system?

To chew food

To break down food using acid and enzymes

To pump blood

To absorb water and minerals

2 / 25

In a food web, what is the term for an organism that consumes both plants and animals?

Omnivore

Producer

Carnivore

Herbivore

3 / 25

Which state of matter has a **definite shape and definite volume**?

Gas

Plasma

Solid

Liquid

4 / 25

What is the main function of the **nervous system** in the human body?

To break down food and absorb nutrients.

To coordinate the body's actions and transmit signals between different parts.

To provide a framework and support for the body.

To transport oxygen and nutrients to cells.

5 / 25

Which of the following describes the process of **meiosis**?

A type of cell division that produces four genetically different daughter cells with half the number of chromosomes.

The process of a cell growing and developing before it divides.

A process of cell division that results in two identical daughter cells.

The process by which a plant makes its own food.

6 / 25

What is the function of the **ribosome** in a cell?

To produce energy for the cell.

To store genetic information.

To produce proteins.

To control all cell activities.

7 / 25

Which of the following is the best example of a **chemical change**?

Burning a piece of wood.

Tearing a piece of paper.

Melting an ice cube into water.

Dissolving salt in water.

8 / 25

What is the main role of the **lungs** in the human body?

To filter blood.

To exchange oxygen and carbon dioxide.

To digest food.

To pump blood.

9 / 25

How is the speed of an object calculated?

Mass multiplied by acceleration.

Distance multiplied by time.

Time divided by distance.

Distance divided by time.

10 / 25

What is the difference between **weather** and **climate**?

Weather describes short-term atmospheric conditions, while climate describes long-term weather patterns.

There is no difference; the terms are interchangeable.

Weather is affected by the Sun, but climate is not.

Climate is studied by meteorologists, while weather is studied by climatologists.

11 / 25

What is the primary role of the **heart** in the human circulatory system?

To digest food and absorb nutrients.

To exchange oxygen and carbon dioxide with the air.

To pump blood throughout the body.

To filter waste products from the blood.

12 / 25

Which of the following is a characteristic of a **physical property** of matter?

It can be observed or measured without changing the substance's chemical composition.

It can only be observed by changing the substance's chemical identity.

It results in the formation of a new substance.

It describes how a substance reacts with other substances.

13 / 25

What is the main difference between a **plant cell** and an **animal cell**?

Plant cells have a cell wall and chloroplasts, which animal cells do not.

Animal cells have a large central vacuole, while plant cells do not.

Animal cells have a nucleus, but plant cells do not.

Plant cells are much smaller than animal cells.

14 / 25

In a food chain, what is the role of a **producer**?

An organism that makes its own food.

An organism that eats only plants.

An organism that breaks down dead organic matter.

An organism that eats other animals.

15 / 25

Which of the following describes a characteristic of the **troposphere**?

It contains the ozone layer that protects Earth from ultraviolet radiation.

It contains the ionosphere, which reflects radio waves.

It is the outermost layer of the atmosphere.

It is the layer where all weather phenomena occur.

16 / 25

What is the primary product of **photosynthesis** that provides energy for the plant?

Glucose

Carbon dioxide

Oxygen

Water

17 / 25

The **Law of Conservation of Energy** states that:

Energy cannot be created or destroyed, but can be converted from one form to another.

Energy can be created and destroyed.

Energy can be created but not destroyed.

Energy can be destroyed but not created.

18 / 25

Which layer of the Earth is a solid, metallic sphere at the center?

Crust

Mantle

Outer core

Inner core

19 / 25

A student wants to measure the volume of an irregularly shaped rock. Which tool should they use?

A graduated cylinder

A weighing scale

A thermometer

A ruler

20 / 25

Which component of an atom carries a positive charge?

Electron

Nucleus

Neutron

Proton

21 / 25

Why does the Sun appear so much larger and brighter than other stars?

It is the only star that produces its own light.

It is a larger and hotter star than any other star in the universe.

It is much closer to Earth than any other star.

It reflects light from the other stars, making it appear brighter.

22 / 25

Which of the following is an example of **convection**?

Heat traveling along a metal spoon placed in hot soup.

The Sun's rays warming the Earth.

Touching a hot stove and feeling the heat.

The rising of hot air and the sinking of cooler air.

23 / 25

What is the process called when **water vapor turns into liquid water**?

Transpiration

Evaporation

Precipitation

Condensation

24 / 25

The **rock cycle** describes the continuous process of how rocks change. What type of rock is formed from compacted layers of sand and silt?

Metamorphic rock

Sedimentary rock

Igneous rock

Magma

25 / 25

Which of the following is an example of an **abiotic factor** in an ecosystem?

A plant

A mushroom

A rock

A lion

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Grade 7 Science Diagnostic Exam

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