Grade 7 Science Diagnostic Exam

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1 / 25

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

To absorb water and minerals

To chew food

To pump blood

To break down food using acid and enzymes

2 / 25

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

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

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.

3 / 25

How is the speed of an object calculated?

Distance multiplied by time.

Distance divided by time.

Mass multiplied by acceleration.

Time divided by distance.

4 / 25

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

The Sun's rays warming the Earth.

Heat traveling along a metal spoon placed in hot soup.

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

Touching a hot stove and feeling the heat.

5 / 25

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

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.

It is the only star that produces its own light.

6 / 25

Which component of an atom carries a positive charge?

Nucleus

Neutron

Electron

Proton

7 / 25

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

To control all cell activities.

To produce proteins.

To produce energy for the cell.

To store genetic information.

8 / 25

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

Gas

Liquid

Plasma

Solid

9 / 25

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

To break down food and absorb nutrients.

To transport oxygen and nutrients to cells.

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

To provide a framework and support for the body.

10 / 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 but not destroyed.

Energy can be created and destroyed.

Energy can be destroyed but not created.

11 / 25

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

A weighing scale

A thermometer

A graduated cylinder

A ruler

12 / 25

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

A plant

A lion

A mushroom

A rock

13 / 25

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

Tearing a piece of paper.

Burning a piece of wood.

Dissolving salt in water.

Melting an ice cube into water.

14 / 25

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

Omnivore

Carnivore

Herbivore

Producer

15 / 25

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

Condensation

Precipitation

Evaporation

Transpiration

16 / 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 nucleus, but plant cells do not.

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

Plant cells are much smaller than animal cells.

17 / 25

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

An organism that eats only plants.

An organism that eats other animals.

An organism that breaks down dead organic matter.

An organism that makes its own food.

18 / 25

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

To exchange oxygen and carbon dioxide.

To filter blood.

To digest food.

To pump blood.

19 / 25

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

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

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

It results in the formation of a new substance.

It describes how a substance reacts with other substances.

20 / 25

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

It is the outermost layer of the atmosphere.

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

It contains the ionosphere, which reflects radio waves.

It is the layer where all weather phenomena occur.

21 / 25

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

Inner core

Mantle

Outer core

Crust

22 / 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?

Igneous rock

Sedimentary rock

Magma

Metamorphic rock

23 / 25

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

To pump blood throughout the body.

To exchange oxygen and carbon dioxide with the air.

To filter waste products from the blood.

To digest food and absorb nutrients.

24 / 25

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

Glucose

Water

Carbon dioxide

Oxygen

25 / 25

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

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.

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

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Grade 7 Science Diagnostic Exam

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