Show:
Unit 1
Molecules
Unit 2
Atoms & Elements
Unit 3
Chemical Reactions
Unit 4
Energy
Units 5+6
Motion & Forces
100

How do you calculate density?

Density = mass / volume

100

What type of charge does a proton have?

Positive

100

This law states that during a chemical reaction, no mass is gained or lost.

Law of Conservation of Mass

100

This law states that within a system, no energy is created or destroyed.

Law of Conservation of Energy

100

What is the term that describes a resistance to a change in motion?

Inertia

200

Process where heat transfers from an area of higher energy to an area of lower energy.

Conduction

200

What type of charge does an electron have?

Negative

200

What is the purpose of a catalyst in a chemical reaction?

Catalysts speed up chemical reactions

200

What are 2 ways to increase the amount of potential energy an object has?

Increase height or mass

200

Equation for speed.

Speed = distance / time

300

What happened to the mass and volume in our popcorn experiment?

Mass decreased

Volume increased

300

What type of charge does a neutron have? 

Neutral

300

Does the identity of a substance change in a physical reaction or chemical reaction?

Chemical reaction

300

Equation for potential energy.

PE = mass x gravity x height

300

What is the main difference between distance and displacement?

Displacement includes a direction

400

What happens to molecules when they are heated?

Gain energy, move faster, separate slightly

400

Which of the 3 subatomic particles has the smallest mass?

Electron

400

Give 2 examples of a physical change.

Breaking glass, cutting paper, melting ice

400

Equation for kinetic energy.

KE = 1/2 x mass x velocity2

400

How do you determine the net force on an object?

Calculate the sum/difference of all forces acting on the object. 

500

Name 2 characteristics of molecular behavior in a gas.

Indefinite volume, high energy, low attraction
500

When using a periodic table, what 2 quantities have the same value as the atomic number?

# of protons

# of electrons

500

Give 2 examples of a chemical change.

Digestion, baking a cake, burning wood

500

What is the kinetic energy of a 50 kg object moving 10 m/s?

2,500 Joules

500

Describe the shape of a line showing constant speed on a velocity-time graph. 

Horizontal line, parallel to the x-axis.