Sras Gr.7 Science (Elements)
18 Questions
| Attempts: 96
.
Questions and Answers
- 1.Which one do you think doesn't belong to the group of heterogenous?
- A.
Cereal in milk
- B.
Pulpy orange juice
- C.
Fruit salad
- D.
Sand
- E.
Milk
- F.
Halo-Halo
- 2.Which one do you think doesn't belong to the group?
- A.
Salt water
- B.
Juice
- C.
Gatorade drinks
- D.
Gravel
- E.
Soda drinks
- 3.Copper wire is belong to what group?
- A.
Heterogenous
- B.
Element
- C.
Homogenous
- D.
Compound
- 4.Compound and elements are considered pure substances.
- A.
True
- B.
False
- 5.Mixtures are considered also as pure substances.
- A.
True
- B.
False
- 6.They constitute the simplest chemical substances in which all the atoms are exactly the same.
- 7.They are represented by their chemical formula.
- 8.Check all the COMPOUNDS.
- A.
Acetic Acid
- B.
Water
- C.
Brass
- D.
Carbon dioxide
- E.
Sugar
- F.
Methane
- G.
Sucrose
- H.
Pork
- I.
Mud
- J.
Cooking oil
- 9.Check all the HETEROGENOUS MIXTURES.
- A.
Peanut butter
- B.
Copper wire
- C.
Air with no clouds
- D.
Concrete
- E.
Carbonated beverage or beerOption 5
- F.
Oil and water
- 10.When an acid is dissolved in water,there are more hydrogen ions than hydroxide ions in the solution.
- A.
True
- B.
False
- 11.Base reacts to metals violently.
- A.
True
- B.
False
- 12.The higher the pH level of a substance, the more acidic it is.
- A.
True
- B.
False
- 13.Most acid feels slippery when touched.
- A.
True
- B.
False
- 14.The pH level of neutral substances is 7.
- A.
True
- B.
False
- 15.Most bases (substances) has hydroxide in their chemical composition.
- A.
True
- B.
False
- 16.Do we consider the pure substance as compound when it has it chemical formula?
- A.
True
- B.
False
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