2. Unit Test 1 Review Seventh Grade Science WAMS Prepared by: Mrs. Traya

3. WHO AM I ? A Plant is in this condition due to lack of water____________________.

4. ANSWER IS-

5. Plants respond by bending or growing towards the direction of the Sun. This tropism is known as -

6. Answer:

7. The condition of the plant on the left is caused by the high pressure of water inside the vacuole. This term refers to-

8. Answer:

9. Plants Roots grow downward due to the pull of this stimulus-

10. Answer:

11. Sensitive Plants such as vines and venus fly trap are Thigmotropic plants. This means that they easily respond to what stimulus?

12. Answer:

13. Plants coil or wrap around solid things such as fences and even climb walls and trunks of trees. What tropism is this?

14. Answer:

15. PLANTS ROOTS GROW DOWNWARD DUE TO THE PULL OF GRAVITY. THIS TROPISM IS KNOWN AS-

17. , Which organism/s in the food web above will be negatively affected if the population of deer and rabbits will increase? Justify your answer.

18.  Identify the producers in this food web and describe their role.

19. All of the following are Organic compounds except- (justify your answer)  B. C 6 H 12 O 6 (glucose)  A. CH 4 (methane)  C. H 2 O (water)  D. CH 3 COCH 3 (acetone)

20.  W=FD  Mr. Comeros is pushing a box up a ramp a distance of 8 meters with a force of 35 Newtons. Calculate the amount of work done.

21. Ted pushes against the wall with all his might. He pushes so hard he begins to sweat. Ted pushed against the wall for 30 seconds with a force of 30 Newtons. How much work has he done? (justify your answer)

22. Which organisms break down huge molecules of dead plants and animals in a compost? F. primary consumers G. secondary consumers H. producers I. decomposers

23. Which of these best describes organic matter? A. It contains only hydrogen element B. It contains both hydrogen and oxygen atoms C. It contains carbon, hydrogen and other elements D. It contains carbon and nitrogen only

24. Which of these describes a chemical change during digestion of food? A. The tongue shapes the food into a ball. B. Teeth chop, tear and grind the food in the mouth. C. Enzymes change carbohydrates in food into sugars. D. Saliva mixes with the food to make it wet.

25. Describe what happens to the amount of energy from the first trophic level to the fifth level. Which organism gets the most energy? Why?

26.  Based on the diagram above, which of the following matters are continuously cycled on earth? A. Helium, oxygen and carbon B. Carbon, Oxygen, Nitrogen and water C. Plants, Animals, and Decayed Organisms D. Fossils, water and Smoke from vehicles

27. All organisms in a pond pass on chemical energy from one level to the next.  Correctly arrange the organisms listed below according to their correct level in a food chain starting from the sun.  Small fish  Algae  Eagle  Large fish

28. What variable do these science tools measure?

29. The student stands with the box while adjusting his weight. He is getting ready to walk while carrying the box. Has he done work?

30.  A PLANT TRANSFORMS SOLAR ENERGY FROM THE SUN, A BIRD EATS THIS PLANT.  WHAT ENERGY DOES THE BIRD RECEIVES FROM THE PLANT?

31. DESCRIBE THE FUNCTION OF VACUOLES IN ANIMAL AND PLANT CELLS?

32.  JOHN USES A FORCE OF 10 N TO LIFT A BOX A DISTANCE OF 1 METER UP THE TRUCK.  DAVID USES A FORCE OF 5 N TO PUSH THE SAME MASS OF BOX A DISTANCE OF 2 METER UP THE TRUCK.  WHICH OF THEM DID MORE WORK LOADING IDENTICAL BOX ONTO THE TRUCK?

33. CITE AN EVIDENCE OF CHEMICAL DIGESTION WHEN YOU ARE EATING HAMBURGER?

34.  1. What increases the rate of PHOTOSYNTHESIS?  2. WHICH STRUCTURES IN PLANT CELLS ABSORB ENERGY FROM THE SUN DURING PHOTOSYNTHESIS?

35. WHICH ORGANISMS BREAK DOWN ORGANIC MATERIALS OR DECAYED BIOMASS IN COMPOST BIN? PRODUCERS DECOMPOSERS CONSUMERS TREES

36. WATER (H2O) METHANE (CH4) HYDROGEN CHLORIDE (HCl) WHICH OF THE FOLLOWING IS AN ORGANIC MOLECULE?

37. PHYTOPLANKTON, SHRIMPS, FISH, AND SHARKS.  WHICH ORGANISM IN THE LIST ABOVE TRANSFORMS ENERGY FROM THE SUN?

38. GIVE AN EXAMPLE OF PHYSICAL DIGESTION OF an Apple IN THE DIGESTIVE TRACT?

39. 1. Which organism receives the greatest energy? Why? 2. Which organism receives the least? Why?

40. Describe the energy transformation that will occur after digestion?

41. WHAT HAPPENS TO LARGE MOLECULES LIKE CARBOHYDRATES DURING DIGESTION?

42. All chemicals listed below can be classified as Organic Compounds. True or False. Justify your answer.