Grade 7 Science Diagnostic Exam

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AbuBakrShalabi

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1 / 25

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

Crust

Outer core

Inner core

Mantle

2 / 25

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

Herbivore

Carnivore

Producer

Omnivore

3 / 25

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

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.

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

4 / 25

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

It is the outermost layer of the atmosphere.

It contains the ionosphere, which reflects radio waves.

It is the layer where all weather phenomena occur.

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

5 / 25

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

To pump blood

To break down food using acid and enzymes

To chew food

To absorb water and minerals

6 / 25

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

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

There is no difference; the terms are interchangeable.

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

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

7 / 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.

8 / 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

Magma

Igneous rock

9 / 25

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

To digest food.

To exchange oxygen and carbon dioxide.

To filter blood.

To pump blood.

10 / 25

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

It is much closer to Earth than any other star.

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

11 / 25

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

Oxygen

Water

Glucose

Carbon dioxide

12 / 25

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

Liquid

Plasma

Gas

Solid

13 / 25

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

To pump blood throughout the body.

To digest food and absorb nutrients.

To exchange oxygen and carbon dioxide with the air.

To filter waste products from the blood.

14 / 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 results in the formation of a new substance.

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

It describes how a substance reacts with other substances.

15 / 25

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

Energy can be destroyed but not created.

Energy can be created and destroyed.

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

Energy can be created but not destroyed.

16 / 25

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

Touching a hot stove and feeling the heat.

Heat traveling along a metal spoon placed in hot soup.

The Sun's rays warming the Earth.

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

17 / 25

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

An organism that makes its own food.

An organism that breaks down dead organic matter.

An organism that eats other animals.

An organism that eats only plants.

18 / 25

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

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.

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

19 / 25

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

A rock

A lion

A mushroom

A plant

20 / 25

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

Melting an ice cube into water.

Tearing a piece of paper.

Dissolving salt in water.

Burning a piece of wood.

21 / 25

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

To store genetic information.

To produce proteins.

To control all cell activities.

To produce energy for the cell.

22 / 25

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

To provide a framework and support for the body.

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

To transport oxygen and nutrients to cells.

To break down food and absorb nutrients.

23 / 25

Which component of an atom carries a positive charge?

Electron

Nucleus

Proton

Neutron

24 / 25

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

Evaporation

Condensation

Transpiration

Precipitation

25 / 25

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

A weighing scale

A thermometer

A ruler

A graduated cylinder

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Grade 7 Science Diagnostic Exam

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