1. Elements and their Combinations
Unit D
Elements and their Combinations

2. What is matter? Something that has mass and takes up space
Something that is important
Something that is a problem
Something that takes up no space and is invisible

3. What is matter made up of?
Organs
Cells
Atoms
Links

4. Which element is a metal?
Oxygen
Gold
Carbon
Helium

5. Which is NOT a property of a metal?
Shiny
Can bend
Melts easily
Gets hot

6. What is the smallest number of parts in a compound?1 2 3 4

7. You can see an atom with Your eye A special telescope
A magnifying glass
A special microscope

8. Atoms may combine to form a(n)
Mixture
Molecule
Nucleus
Element

9. What does periodic mean
Happening sometimes
Happening all the time
Happening at regular times
Happening at the end

10. What element is a building block of matter in living things?
Carbon
Hydrogen
Helium
Oxygen

11. Which one of the following is NOT one of your senses?
Hearing
Sight
Touch
Thinking

12. Which group lists the physical properties of materials?
Shape, color, ability to float
Smell, density, ability to rust
Color, texture, ability to burn
Taste, texture ability to rust

13. Which is an example of a chemical change?
Cutting paper
Making ice
Burning wood
Boiling water

14. A compound is made up of An element Different kinds of atoms
The same kind of atom
Salt and water

15. Water is a
Compound
An element
A mixture
A solution

16. What will happen in this beaker?
Nothing
The water will boil
The water will disappear
The sugar will dissolve

17. The temperature at which a solid changes to a liquid is called the
Boiling point
Celsius scale
Fahrenheit scale
Melting point

18. Some foods taste because they contain a type of chemical called an acid. Which food contains acid?
Ice cream
Lemons
Peas
Chicken

19. What is NOT a property of salt?
It is white
It is made of tiny crystals
It tastes sour
It mixes in water

20. The amount of space an object takes up is called its
Temperature
Mass
Volume
Shape

21. Which kind of substance has no definite shape and probably a large amount of space between its particles?
Solid
Liquid
Gas
Water

22. Which substance has no definite shape but has a definite volume?
Iron fillings
Liquid water
Nitrogen gas
Salt crystals

23. The process of liquid water changing to a gas is called
Freezing
Precipitation
Melting
Vaporization

24. Which is a property of glass?
It is clear
It can bend
It is soft
It is a liquid at room temperature

25. Chocolate milk is
A chemical
A compound
A mixture
A reaction

26. Hydrogen combines with oxygen to make water
Hydrogen combines with oxygen to make water. A scientist calls the hydrogen and oxygen
Ingredients
Reactants
Products
Energy

27. A difference between a physical change and a chemical change is that in a chemical change
A new substance forms
No new substance forms
Only the shape of the substance changes
Only the size of the substance changes

28. What do solids, liquids, and gases have in common?
They can be squeezed to take up less space
People can see them
They have shape
They are made up of particles