The clay only changes it's shape, it can be changed back, etc.
100
Melting crayons is an example of a ______________
physical change
100
a liquids resistance to flow is called...
viscosity
100
What chemical property is responsible for iron rusting?
re-activity with oxygen
200
Which of the following would be the easiest to start moving?
1) a cart loaded with two potatoes
2) an empty cart with no potatoes
3) a cart loaded with many stacks of potatoes
4) a cart with one potato
2) an empty cart with no potatoes
200
What is physical science?
The relationship between matter and energy.
200
The smaller an objects mass, the ____________it's inertia.
smaller
200
Malleability is an example of
1) a physical change
2) a physical property
3) a chemical property
4) a chemical change
2) a chemical property
200
What is the change of state which solid changes directly to a gas called?
sublimation
300
Explain how you know that baking a cake is a chemical change.
The ingredients combine to form a new substance and it is not reversible.
300
What is energy?
The ability to do work
300
Which of the following is a chemical property of matter?
1) solubility
2) reactivity
3) volume
4) density
2) reactivity
300
Dew collection is an example of what change of state?
condensation
300
Describe what the particles are doing in a solid.
Vibrate in place with strong attraction between the particles. They have a definite shape and volume.
400
What is matter?
The "stuff" everything is made of.
400
What are scientific methods?
Steps scientists use to answer questions and solve problems.
400
Explain the process of comparing the densities of several liquids.
Pour the liquids into a container (or a graduated cylinder) and observe how they separate into layers.
400
Which of the following is the most important part of gathering knowledge in science?
1) looking up answers
2) memorizing materials
3) asking questions
4) using the internet
3) asking questions
400
What do the particles do when a liquid becomes a gas?
The particles speed up, rise in temperature, and break away from each other.
500
What is the process of obtaining information from the senses called?
observation
500
Why is the international system of measurement important?
It is easy to use and used by most scientists.
500
Which property of matter is a measure of the gravitation force?
weight
500
What are the names of the three scientific models?
physical, mathematical, and conceptual.
500
Describe what particles do at higher temperatures.
The particles gain energy, increase in temperature, move faster and spread apart.