Scc: Chemistry Lesson 2

Front 1

What determines the energy level of a substance?

Back 1

the speed of the particles

Front 2

Particles can move around each other.

Back 2

liquids

Front 3

Particles move at high speeds in all directions.

Back 3

gases

Front 4

A substance's ability to absorb heat:

Back 4

specific heat.

Front 5

Water has a unique ability to absorb a lot of heat before:

Back 5

its temperature changes.

Front 6

Everything that happens in your body and the world around you either:

Back 6

requires energy or produces energy.

Front 7

The ability to perform some sort of activity or to produce heat:

Back 7

energy.

Hint 7

It comes in many forms, including heat, light, sound, mechanical energy, electrical energy, and chemical energy.

Front 8

All forms of energy are either:

Back 8

potential or kinetic.

Front 9

Stored energy is known as:

Back 9

potential energy.

Hint 9

Think of it as the potential ability to perform some sort of activity or to produce heat.

Front 10

An object's position can cause it to:

Back 10

have potential energy.

Hint 10

Imagine carrying a large rock up to the top of a hill.
You're spending your own energy to move the rock against the earth's gravity.
Once it's at the top of the hill, the rock has the potential to roll downhill, so it has potential energy.
You transferred energy from your own body to the rock by changing its position.

Front 11

The bonds formed between atoms and molecules cause a substance to have:

Back 11

potential energy.

Hint 11

For example, your body uses glucose molecules as its most important energy source.
A glucose molecule consists of six atoms of carbon, 12 atoms of hydrogen, and six atoms of oxygen.
Its formula is C6H12O6, and chemical bonds hold the atoms in this molecule together.
The chemical nature of those bonds allows them to store energy that you can use for your body's activities.

Front 12

The energy of motion is known as:

Back 12

kinetic energy.

Hint 12

Once that rock you moved starts rolling down the hill, its potential energy changes to kinetic energy.

Any object or substance that's moving demonstrates kinetic energy.

Front 13

What makes a good example of kinetic energy?

Back 13

An ice skater spinning in circles.

Front 14

What type of motion describes the motion of molecules or atoms moving in a straight line?

Back 14

Translational motion.

Front 15

In what direction does the movement of thermal energy flow?

Back 15

From warmer to cooler objects.

Front 16

Which temperature reading represents a higher amount of thermal energy?

A. 32 °F.
B. 330 K.
C. 0 °C.
D. 100 °C.

Back 16

B. 330 K.

Front 17

Which type of reaction represents an exergonic reaction?

Back 17

The breaking down of complex carbohydrate molecules in oatmeal into smaller glucose molecules.