Grade 8 Midterm Review #2

Which of the following is an example of an unbalanced force?

Endothermic reactions ______.

What is the efficiency of a system that uses 100 J of input work and exerts 80 J of output work

What is the term for speed at any instant in time?

In a controlled experiment there are usually two groups—an experimental group and

Which dwarf planet is located in the asteroid belt?

Boyle’s Law describes the properties of a _____.

Which of the following is an example of a noncontact force?

This planet has no atmosphere.

2 birds are pulling on a worm and the worm moves toward the 1^st bird,  the forces are

Acceleration involves a change in ____.

A limiting factor for using nuclear energy is the ____ produced.

Which are two forms of potential energy?

Two or more substances that are physically blended but are not chemically bonded are called

We are able to walk forward because _____.

Which type of energy is a result of motion?

It takes 10 minutes for the 5-km drive home. What can you calculate with this information?

Which of the following is NOT an idea in the kinetic molecular theory?

On Earth, hydrogen and helium are found as gases. Why are they liquid on the outer planets?

One tool that can be used to display your data is a ____.

If two atoms have the same # of protons but different # of neutrons, they will have the same

Which scientific tool would be primarily used by scientists?

Marco boiled water for eggs. After a few minutes, all the water was gone. This is an example of

If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.

When you graph the speed of an object, you put ____ on the x axis and ____ on the y axis.

Lightning flashes contain which of the following types of matter?

A certain atom has 26 protons, 26 electrons, and 30 neutrons. It mass number is ____.

The work output of a machine divided by the work input is the ____ of the machine.

Which of the following determined that cathode rays are negatively charged?

A prediction or statement that can be tested is ____.

A solution that contains the max amount of solute it can hold at a given temperature & pressure

In _____, the atomic number increases by one.

____ for a planet to form in the asteroid belt.

According to Newton's second law of motion, ____.

Which of the following best completes the sentence?For every action there is _____.

In an atom, electrons ____.

Which of the following is a factor in an experiment that does not change?

One of ____ moons is larger than the planet Mercury.

Two of the inner planets are ____.

A small rocky particle from space enters Earth’s atmosphere & hits the ground before burning up

A winding mountain road is an example of a(n) ____.

Which type of bridge is the best type to span short distances?

_____ increases when a ball bounces up and decreases as a ball goes down.

A 300-N force acts on a 25-kg object. The acceleration of the object is ____.

Scientists believe that ____ are from the Oort Cloud located beyond the orbit of Pluto.

The upward force on an object falling through the air is ____.

Which of the following objects are larger than the dwarf planets?

Cars with the same mass & speed, collide & stick together. After the momentum of the cars is