6-8 JLAB Review Set 4

The picture above shows a flask of hot water. This test was carried out to find out which type of container would hold heat the longest. Which of these graphs bests shows all of the data from this experiment?

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Which of these best shows a change from solar energy to chemical energy?

• Evaporation of water

• Heating of pavement

• Photosynthesis in leaves

• Formation of rainbows

Animals and plants get their food in different ways. Animals usually ingest their food, while plants must produce their own food. The process through which plants produce their food is called

• respiration

• photosynthesis

• pollination

• germination

An open-air waste water treatment plant is flooded by rain. The rainwater and the waste run into a nearby creek. The organic wastes are very high in Biological Oxidation Demand (BOD) which means the bacteria in the waste need a lot of oxygen. What is the best hypothesis to explain why many fish might die as a result of this event?

• The bacteria remove the oxygen from the water.

• The bacteria create toxic wastes.

• The bacteria are eaten by the fish and are toxic.

• The bacteria eat all the food in the creek.

Which type of characteristics can be inherited?

• Those controlled by genes

• Those caused by accidents

• Those produced by exercise

• Those produced by diet

When animals hibernate, their heart rate and respiration decrease and they lose consciousness. Why do some animals hibernate?

• To increase their body fat during cold periods

• To conserve energy usage during the winter

• To give their fur time to grow longer and thicker

• To rest after a summer of high activity

According to the scale shown above, what is the approximate length of the baby blue whale?

• 2 meters

• 4 meters

• 6 meters

• 10 meters

Compounds are made up of more than one element. Which of the following represents a compound?

• H₂

• NH₃

• O₃

• N₂

Which of these would be different for an object if measured on the Earth and on the moon?

• Mass

• Weight

• Volume

• Density

The island of Guam had no native snake species until the brown tree snake was introduced. What effect did this egg-eating snake have on the native bird populations?

• Bird populations were not affected by the snake's introduction

• Bird populations increase as the birds preyed on the snakes

• Bird populations decreased as the snakes fed on the bird eggs

• Bird populations increased as the snakes eliminated predators