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Science Chapter 1 Answer Key

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Lesson 1
#1 What is matter? Anthing that has mass and takes up space
#2 What are some properties of metal? conductors of electricity and heat, can be shaped into sheets, can be shaped into sheets or wire, solids, have gray color, can reflect light, shiny
#3 What is the theory "everything is made up of tiny particles called atoms" called? Atomic Theory
#4 How do the molecules in an ice cube move? The particles are packed closely together, they do not move, just vibrate
#5 Diamonds and graphite are both made of carbon atoms, why do they have different properties? The atoms are connected differently
Lesson 2
#1 Are color and texture examples of physical or chemical properties? Physical properties
#2 What tool is used to measure mass? A balance
#3 What is the measure of the average amount of motion in particles of matter called? Temperature
#4 How could you cause a physical change to an apple? Cut it into pieces, peel the skin, etc.
#5 How could you cause a chemical change to sugar? You bake a cake with it
Lesson 3
#1 What are the three states of matter? Solid, liquid, and gas
#2 When a solid becomes a liquid it is called... Melting
#3 When a liquid becomes a gas it is called... Evaporation
#4 When a gas becomes a liquid it is called... Condensation
#5 These states of matter take the shape of the container they are in. Liquid and Gas
Lesson 4
#1 Mixtures are... when different materials are placed together but each material keeps it's own properties(can be separated)
#2 What is one mixture you can eat? How can you separate the parts? Answers will vary. Example: Cheerios, strain the cereal from the milk
#3 In a solution, the substance that dissolves is called the... Solute
#4 Iced Tea powder mixed with water is an example of a... Solution
#5 How would you separate a mixture of paper clips, cheerios, and milk. Use a magnet to separate the paper clips. Use a strainer to separate the cheerios and milk.
Lesson 5
#1 What is a change in property that does not form a different kind of matter? Physical Change
#2 What type of change is when one or more types of matter change into matter with different properties? Chemical Change
#3 How does temperature effect physical changes? Physical changes may happen more or less easily depending on temperature. Example: Butter is easier to spread when it is warm.
#4 How does temperature effect chemical changes? Particles move faster as the temperature rises, they can rearrange themselves into new substances quickly.
#5 Why do you think medicine often says "Store in a cool, dry place"? The medicine in the bottle may change if it is heated.
Final Question
Why are metals a useful material for electricians? They conduct electricity and can be made into wire