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Which of the following is safe to do during a lab activity? washing your hands often mixing unknown substances putting your fingers in a mold culture drinking a solution 2

Shanice and Luis are doing a lab investigation. As part of the experiment, they place one bean plant under a heat lamp. Which of the following actions does NOT show a safe lab action? carefully placing exactly one bean seed in each pot measuring the height of the sprouts each week leaving the heat lamp on overnight recording the temperature under the lamp with a thermometer 3

The thermometer shows the temperature on Monday afternoon. The temperature on Tuesday afternoon is 8 degrees cooler. What will the temperature be on Tuesday afternoon ? 40 0 4

Which of the following would NOT be the correct way to handle chemicals? Return unused chemicals to their original containers. Wear safety goggles when working with chemicals. Move quickly from the site of a chemical spill. Never touch, taste, or smell chemicals. 5

If you wanted to find out how fast water changes from a liquid to a solid, you would use a _________________. compass microscope stopwatch balance 6

A group of fifth graders were outside when they saw an insect that looked interesting. They wanted to examine it more closely without bringing it inside. What should they use? microscope hand lens magnet metric ruler 7

What mass is on the scale to make the objects balance? A. 350 g B. 500 g C. 250 g D. 150 g 8

Nico wants to find out about the eating behaviors of mice. Which of the following questions should she ask? How long do mice live? Can a mouse have more than one litter in its life? Is a mouse a herbivore or a carnivore? Which climate region has the most mice? 9

Edward Jenner was a physician. In 1796, he showed scientifically that a person who had been exposed to a disease called cowpox would not get sick when exposed to the more serious disease smallpox. What question might Jenner have asked that led to his experiment? Why is it that cows do not get smallpox like human beings do? If people wash their hands more, will they keep catching cowpox? What is it about cowpox that keeps people from getting sick with small pox? If everyone in the world had smallpox, what would happen to the cowpox disease? 10

Students wanted to find out how well pepper plants grew in different amounts of sunlight. They placed 3 plants on a windowsill and 3 plants in the closet. The students gave each plant an equal amount of water every day. After several days, the students observed and measured the heights of each plant. What is being tested in this experiment? the amount of water given amount of sunlight received number of days the plants grew number of pepper plants used 11

Mike uses a spring scale to measure the difference between pulling a block of wood on the classroom floor and pulling two blocks of wood on the cafeteria floor. He made a mistake when he designed this experiment. Which variable should he change in order to have more accurate results? He should change the size of the wood blocks. He should use the same surface both times. He should change the way he measured the mass of the blocks. He should change the wood blocks to plastic blocks. 12

What is the first step a good scientist must take before attempting to carry out an investigation? decide which controls will be used ask a question that leads to gathering information predict what will happen as a result of the experiment create a graph or chart to gather the results SCIENCE ROCKS! 13

Chelsea and Yan want to find out which species of birds are native to their schoolyard. What would be the best way to find out? Watch two birds for one month and record their movements. Observe the schoolyard each day for a month and record the different types of birds they see. Conduct an experiment in which different types of bird feed are put out each day. Watch the schoolyard for one day and note how many times one species of bird appears. 14

Ms. Barnaby asked her students to find out if a paper napkin would dry faster when flat or folded up. Which method would be the best way to test that? A. Lay one wet napkin flat on the table. Lay one wet, folded napkin by a warm window. Use a Brawny napkin for the flat test. Use a Scott napkin for the folded test. Lay one wet napkin flat and lay one wet napkin folded in the same location at the same time. Use the same brand of napkin in the test. D. Time how long it takes for a flat napkin to dry on Monday. Time how long it takes for the folded napkin to dry on Tuesday. 15

What is the mass on this triple beam balance scale? 16

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What two forms of energy does a flame from a burning candle release? A. Electrical and mechanical Chemical and electrical Light and Heat Heat and Nuclear 18

Look at the experiment setup below. What could the science class be investigating? A. Will a rubber ball roll farther than a wooden ball? B. How far will a green ball roll? C. Will a ball roll farther when placed on a higher ramp? D. How high can boxes be stacked with a ramp? 19

A. Oil is on top because it is more dense than the vinegar. B. Vinegar is on the bottom because it is less dense than the oil. C. Oil is on top because it is heavier than the vinegar. D. Oil is on top because it is less dense than the vinegar. A student gets some salad dressing out of the refrigerator to put on her salad. She notices that the dressing has separated into two layers. The first two ingredients on the bottle are oil and vinegar. Which is on top? Why? 20

Which diagram models the path of light energy as it refracts? A C B 21

If the wire to bulb # 2 is disconnected in this circuit, what will happen to the other two bulbs? A. Bulb #3 will go out, #1 will stay lit. B. All the other bulbs will stay lit. C. All the other bulbs will go out. D. Bulb #1 will go out, #3 will stay lit. 3 22

A student tried to use an electromagnet to pick up staples off the carpet in his classroom. It didn’t pick up very many staples. He asked other students to help him make his electromagnet better. Which student’s advice should he follow? A. Student A said, “Wrap fewer coils around the nail.” B. Student B said, “Wrap more coils around the nail.” C. Student C said, “Wrap a longer nail.” D. Student D said, ”Wrap a copper nail instead of an iron nail.” 23

A student leaves a candy bar in the car on a sunny day while shopping at the mall. When the student returns to the car, the candy bar has melted. This is a result of ____________. A. precipitation B. electrical energy C. condensation D. solar energy 24

You can see yourself in a mirror because the mirror does what to the light? The mirror absorbs the light. The mirror separates the light. The mirror reflects the light. The mirror refracts the light. 25

Materials that transfer thermal energy by direct contact better than other materials are called ________________. insulators electromagnetic waves convection ovens conductors 26

Use the balance scale to decide which statement about the mass of the race car is TRUE. The jeep has a mass of 100 kg. A. The mass of the race car is 75 kg. B. The mass of the race car is 100 kg. C. The mass of the race car is less than 100 kg. D. The mass of the race car is more than 100 kg 27

A student had 2 beakers with 240 mL of water in each one. In one beaker she dissolved 50 grams of salt. Then she put both beakers in the freezer at -5˚C for three hours. When she opened the freezer, she observed that the plain water was frozen solid, but the salty water was not frozen. What can the student infer about fresh and salt water? Salt Water Liquid Fresh Water Solid A. Salt water freezes at a lower temperature than freshwater. B. Salt water freezes at a higher temperature than freshwater. C. Salt water and fresh water freeze at the same temperature. D. The freezer must not be working. 28

A. the water vapor rising quickly B. the wind blowing the precipitation C. clouds building in the atmosphere D. the heat from the sun Where does the energy to power the water cycle come from? 29

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Archeologists found the remains of four different fossils. The chart shows the ages of what they found. Which fossil was most likely found in the deepest layer of rock? A. sample F B. sample G C. sample H D. sample J 31

What caused the beach to become smaller? A. Beach animals such as crabs and sea snails took away sand particles at low tide. B. Wind blew the sand into the ocean. C. Erosion by waves carried sand away. D. Waves deposited more sand on the shore. 32

Use the model to help tell what season it is in the northern hemisphere. A. fall B. winter C. summer D. spring Not true to scale 33

What does this model represent? seasons B. solar eclipse C. moon phases D. lunar eclipse You Earthlings, have all the fun! 34

Sediments around a fossil wash away toward the bottom of a hill. What is this process called? A. weathering B. erosion C. deposition D. wave action 35

A cactus has a shallow root system. Why would this adaptation be important to the cactus’ survival in the desert? A. The ground is too hard for the roots to grow deep. B. The roots are able to absorb the maximum amount of water. C. The prickles keep the roots from growing deep. D. The roots keep predators away from the plant. 36

Ocean currents formed the sandy beach for Galveston island. What is this process called? Erosion Deposition Water cycle Weathering Galveston Island 37

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How would a fire change a grassland ecosystem with the above food web? The plants and fungi would burn, but seeds in the ground would sprout into new plants. B. The plants would burn and the ecosystem would be dead forever. C. The animals would all leave and never return. D. A fire would not change an ecosystem. 39

Look at the picture. How has the frog adapted its body from prey? A. Most of its body is camouflaged. B. It lays eggs under the water. C. It is an amphibian. D. It has lungs as an adult. 40

Which offspring plant has similar traits that have been passed on by the parent plant? Parent Plant A. B. D. C. 41

What can you infer from the data in the chart? A. The sandy soil helps plants grow faster. B. The clay soil produces the tallest plants. C. The tomato plant grows tallest in potting soil with humus. D. The type of soil makes no difference in the growth of tomato plants. 42

Whales are warm blooded and can not survive in a freezing cold ocean environment. One summer, a sailor saw a whale off the coast of Alaska. What would be the best explanation for this? The sailor really saw a shark. The whale migrates north during the summer months. The whale was looking for a new place to live. The whale hibernates during the winter. 43