7^th Grade Science 1^st Nine Weeks Test Name:_____________________

1. The kidneys belong to which system?

a) digestive b) circulatory c) excretory d) nervous

2. A hypothesis that passes its test becomes a: (a) better hypothesis (b) theory (c) law

3. Wood is mainly a carbohydrate structure. People turn wood into charcoal, which is mostly carbon, for some fuels. The tree got the carbon for its wood from:

a) Microorganisms in the soil b) Dirt

c) Carbon dioxide gas in the air d) Water

4. Louis Pasteur showed:

a) Water generates life b) Organisms come from other organisms

c) Alcohol kills bacteria d) None of these

5. Yeast: a) Are microscopic b) Turn sugar into alcohol

c) Make carbon dioxide d) All of these

6. Which of these theories have been proven false?

a) Evolution b) Spontaneous generation c) Atomic Theory

d) None of these; theories cannot be proven false, only useful or not

7. Plants make food using water, carbon dioxide and sunlight. They are:

a) Producers b) Consumers

8. A cell placed in an isotonic solution will:

a) Explode b) Shrink c) Stay the same size d) None of these

9. Animals that eat other animals are called:

a) Producers b) Herbivores c) Carnivores

10. “Potable” means: a) Drinkable b) Dead c) Marijuana d) Terrarium

11. What fraction of chromosomes comes from the mother of an organism?

a) 100% b) ½ c) ¼ d) none; they all come from the father

12. The lungs help our bodies absorb: (a) water (b) carbon dioxide (c) oxygen (d) food

13. Pneumonia and tuberculosis (TB) primarily affect which system?

(a) circulatory (b) nervous (c) respiratory (d) digestive

14. In human cells, DNA makes up the:

a) chromosomes b) cell wall c) Golgi apparatus d) vacuole

15. Genes: a) Are made up of DNA b) Carry traits

c) May have various forms, or alleles d) All of these

16. The correct order of progression in normal cells is:

a) RNA makes proteins, which then make DNA

b) DNA makes RNA, which then makes proteins

c) Proteins make RNA, which then makes DNA

7. Connects the mouth to the stomach: (a) liver (b) esophagus (c) small intestine

18. Guanine is always paired with: (a) Adenine (b) Cytosine (c) Thymine

19. Which statement best describes the relationship between dominant and recessive alleles?

a) Recessive alleles are never expressed in the presence of a dominant

b) Dominant alleles are never expressed in the presence of a recessive

c) Recessive alleles are always expressed in the presence of a dominant

20. Which organ is designed to filter (clean) the blood?

a) stomach b) brain c) large intestine d) kidney

21. Stage of mitosis when all the chromosomes line up in the middle:

a) Metaphase b) Prophase c) Telophase d) Anaphase

22. When is DNA replicated?

a) Before mitosis begins b) When the chromosomes are visible

c) When the chromosomes line up d) After chromosomes are separated

23. Which is a major difference between plant and animal cells?

a) Plant cells move less b) Only plant cells have cell walls

c) Only plant cells have chloroplasts d) All of these

24. Jelly-like fluid filling the inside of living cells:

a) chromosomes b) cytoplasm c) nucleus d) cell wall

25. Wood is a large collection of which material?

a) DNA b) Water c) Cell Walls d) Fat

BONUS: Describe your favorite lab experiment of these last nine weeks: