8th Grade Science Exam Questions

The starting substances in a chemical equation (left side)

The substances produced in a chemical reaction (right side)

A number in front of an element or chemical formula in an equation

The total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction:

The smallest particle of an element that still retains the properties of the element; tiny building block of matter, made up of protons, electrons, and neutrons

Particle with a negative charge

Positively charged subatomic particle

Neutral subatomic particle

A(n) _______ is a push or a pull

Which is a force that resists motion between two surfaces that are in contact?

Friction

The strength of the gravitational force between two objects depends on....

Friction always acts _______ the direction of the motion on an object

Forces that cancel each other are called _____ forces

The ______ is the combination of all the forces acting on an object

When balanced forces act on an object, the net force is ______

Newton's first law of motion states that....

An object will remain at rest or keep moving with a constant velocity unless a force acts on it

Acceleration is calculated by dividing the force exerted on an object by the mass of the object

When a force act on an object, its acceleration is in the same direction as the force

When a force is applied to an object, there is an equal force applied by the object in the opposite direction.

A ball is thrown straight up in the air. According to Newton's first law of motion, what is the reason for the ball falling back down

What happens when unbalanced forces act on an object

Newton's Second Law of motion states that.....

An object will remain at rest or keep moving in a straight line with constant speed unless a force acts on it

When a force is applied on an object, there is an equal force applied by the object in the opposite direction

The force on an object can be found by dividing it mass by its acceleration

Acceleration is calculated by dividing the force exerted on an object by the mass of the object

A change in motion is described as ________

Newton's Third law states that.....

An object will remain at rest or keep moving in a straight line with constant speed unless a force acts on it.

When a force is applied on an object, there is an equal force applied by the object in the opposite direction

Acceleration is calculated by dividing the force exerted on an object by the mass of the object.

The force on an object can be found by dividing the mass by its acceleration

What is the attractive force that exists between all objects that have mass called?

Which of the following has not contributed to the increase to the Earth's human population?

Which is the largest number of individuals of a particular species that the environment will support

The loss of Earth's rain forests could result in

What kind of items are often found in a compost pile

Where is desertification most likely to be found?

In a reclaimed strip mine

In a green space in the middle of urban sprawl

In an area where the forest has been cleared and intensive farming has occurred

In a desert area designated for recreational use because of its interesting natural features.

Which type of runoff represents a point of pollution?

Which is not an effect of water pollution?

It can disrupt the water cycle

Ir can add toxic chemicals to water

It can disrupt the balance of nutrients in water

It can kill wildlife found in the water

Which is true of the greenhouse effect

It is purely a manmade phenomena

It does not involve carbon dioxide

It causes cooling of earth's atmosphere

It traps thermal energy from the sun

8th Grade Science Exam Questions

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