7 th Grade Core Test Review - Golf Mr. Olsen 7 th Grade Integrated Science

1 Which process produces the energy needed to carry out life activities? a. circulation b. digestion c. excretion d. respiration

2 The particles that are bound together the tightest are found in a a. gas b. liquid c. solid d. mixture

3 Your teacher gives you a small, jagged stone and asks you to calculate its mass and volume. Which instruments would you use in order to make the measurements? a. microscope and graduated cylinder b. graduated cylinder and triple beam balance c. triple beam balance and ruler d. ruler and microscope

4 If you were to carefully measure the width of cracks in the sidewalk at many different times during a two-year period, which would you expect to find? a. The cracks would remain the same size throughout the time. b. The cracks would be wider during winter than during the summer. c. The cracks would continue to get narrower as time passes. d. The cracks would continue to widen as time passes.

5 Water has a density of 1 gram/milliliter. There are four rocks that all have the same volume of 5 cubic centimeters. The mass for each of these rocks is given below. Which one of the four rocks will float when placed in water? a. 15 grams b. 10 grams c. 6 grams d. 4 grams

6 A balloon filled with helium rises into the air. Why? a. The balloon is larger than air. b. The balloon is heavier than air. c. The helium is less dense than air. d. The helium is more dense than air.

7 Which answer shows the following items in order from the highest density to the lowest density? a. water, atmosphere, core, crust b. atmosphere, crust, core, water c. crust, water, atmosphere, core d. core, crust, water, atmosphere

8 Why is water located above the crust but below the air? a. The density of water is higher than air and higher than the crust b. The density of water is lower than air and higher than the crust. c. The density of water is higher than air and lower than the crust. d. The density of water is lower than air and lower than the crust.

9 If a cell that is 80% water is placed in a solution that is 40% water, which way will the net movement of water go? a. Into the cell b. Out of the cell c. Neither way

10 Sarah put a carrot slice in a beaker of cold salty water and another slice from the same carrot in a beaker of cold fresh water. After an hour, she found that the one in the fresh water was much crispier than the one in the salt water. Which answer best explains her findings? a. the fresh water slice must have come from a crisper carrot. b. the fresh water slice must have been smaller. c. the fresh water in the beaker absorbed water from the cells of the carrot slice. d. fresh water in the beaker went into the cells of the carrot slice.

11 Which letter correctly identifies the 5 levels of cell organization from most complex to simplest? a. tissue, organs, organ systems, cell, organism b. organism, organ system, organ, tissue, cell c. organ system, cell, tissue, organ, organism d. cell, tissue, organ, organ system, organism

12 The epidermis and dermis make up the two main layers of the skin. Skin is an example of which level of organization? a. cell b. tissue c. organ d. system

13 Both parents of a Siamese cat have green eyes. Their offspring also have green eyes. This would be an example of a. an acquired trait b. an inherited trait c. a learned trait d. a found trait

14 You are given 3 unknown organisms labeled A, B, C. When looking at the DNA of the three unknown organisms, you find that they all have the exact same sequence of DNA. Which statement below is the most logical explanation? a. Organisms A, B, and C were reproduced asexually from a common parent b. Organisms A, B, and C were reproduced sexually from a single pair of parents c. Organism A and B are the parents of C. d. Organism A, B, and C are unrelated

15 Bacteria reproduce asexually by dividing in two. If you were to examine the genetic material of two bacteria that had just been reproduces from the same parental cell, how would their genetic material compare? (Assume no mutations occur) a. about 50% the same b. about 65% the same c. 100% the same d. completely different

16 Birds in a desert climate survive on soft parts of cactus. Scientists observed that during a drought, many of the birds died. The ones that survived had larger beaks and were able to crack open and eat hard seeds that would ordinarily not be used. The next generation of birds all had large beaks. How did inherited traits help some birds survive? a. all surviving birds migrated b. inherited traits helped birds get water c. inherited traits helped birds change foods d. the inherited traits changed the environment

17 The more classification levels shared by two organisms: a. the easier it is to tell them apart b. the more distantly related they are c. the move characteristics they have in common d. the closer they live together in their environment

18 What happens to particles of liquid water when the water is heated? a.No change takes place. b.They speed up and the space between them increases. c.They speed up and the space between them decreases. d.They slow down and the space between them increases. e.They slow down and the space between them decreases.

19 Which of the following ways are solids and gases alike? a. Both have particles that move very fast. b. Both have particles that move very slow. c. Both are made of particles. d. Both have particles that are very close together

20 Kelly and Pat are stranded on a desert island in the middle of the ocean. They both are very thirsty and search for water, but don’t find any fresh water on the island. Kelly decides to drink ocean water deciding that although it tastes salty, it doesn’t taste terrible. Pat, on the other hand, decides to drink coconut milk. As the day wears on, Kelly mdrinks more ocean water and complains of being thirstier. Pat, however, isn’t complaining at all. Why might Kelly still be thirsty? a. Osmosis has depleted the water of Kelly’s cells, causing thirst. b. Osmosis has put more salt into Kelly’s cells, causing thirst. c. The salt from the ocean water has held more water in Kelly’s cells. d. Coconut milk contains about half the salt that ocean water does.