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15 Cards in this Set
- Front
- Back
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1.Which of the following is a chemical reaction?
a)breaking glass b)burning wood c)water freezing d)ice melting |
1.
b) burning wood |
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2.Which of these describes a physical change?
a)wood burning b)glass breaking c)leaves changing color d)mixing vinegar and baking powder |
2.
b) glass breaking |
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3. Which gas burns quickly when exposed to a flaming splint?
a) oxygen b) hydrogen c) nitrogen d) air |
3.
b) hydrogen |
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4. Which gas will relight a glowing splint?
a) hydrogen b) oxygen c) water d) neon |
4.
b) oxygen |
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5. Which gas is the most abundant gas found in air?
a) hydrogen b) oxygen c) water d) nitrogen |
5.
d) nitrogen |
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6. Water is made of what 2 elements?
a) helium and oxygen b) hydrogen and oxygen c) nitrogen and hydrogen d) it is not made of elements |
6.
b) hydrogen and oxygen |
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7. Which describes an element?
a)it cannot be broken down into smaller particles that have different characteristics b)it will break down into molecules c)it is made of different kinds of atoms d)it can be broken down into smaller particles with different characteristics |
7.
a) it cannot be broken down into smaller particles that have different characteristics |
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8. What is the smallest unit of Silver?
a) an atom b) a molecule c) a mixture d) a solution |
8.
a) an atom |
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9. What is the smallest particle of Oxygen?
a) an atom b) a molecule c) a mixture d) a solution |
9.
a) an atom |
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10. How many elements are in the compound, Na CO
a) 4 b) 3 c) 2 d) 1 |
10.
b) 3 |
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11. How many elements are in H O?
a) 4 b) 3 c) 2 d) 1 |
11.
c) 2 |
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12. Water (H O) is
a) a compound b) an element c) a mixture d) a rare substance on earth |
12.
a) a compound |
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13. The smallest particle that water can be broken into that still has the same characteristics of water is
a) an atom b) a molecule c) a mixture d) a solution |
13.
b) a molecule |
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14. Which of the following is a mixture?
a) CO2 b) Soil c) Water d) Gold |
14.
b) Soil |
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15. How would you separate a mixture of iron filings and sugar?
a) use filter paper b) use a magnet c) use tweezers d) freeze it |
15.
b) use a magnet |
