Science Bowl Week 5

Imagine that a scientist suggest that the size of an insect population depends on the temperature. What observations must this scientist make in order to collect evidence to support her hypothesis?

• The scientist must observe the insect population only in winter.

• The scientist must observe the insect population in the laboratory.

• The scientist must observe the insect population in different areas.

• The scientist must observe the insect population throughout the year.

Each of the states of matter has specific characteristics. Which statement correctly describes one of these characteristics?

• Solids flow from one place to another

• Liquids have definite volume and shape.

• Gases can expand and be compressed

• The particles in solids have weak forces of attraction.

Jerome put water in the freezer and made ice. Which of the following happened?

• Water underwent a chemical change.

• Water physically changed from a solid to a liquid.

• Water physically changed from a gas to a liquid.

• Water physically changed from a liquid to a solid.

When an unbalanced force acts on an object, the motion of the object changes. Sometimes the object continues to move at the same speed. When that happens, what is it that changes?

• direction

• mass

• friction

• weight

Alex threw a stick in a river and watched as the river carried it away. He scooped a pail of water from the river and noticed a leaf was floating in the pail without moving on the surface of the water. Why did the stick move in the river and the leaf lay still in the pail if it was all the same water?

• The river water cooled off and lost energy when Alex scooped it up into the pail.

• There is more water in the river than in the pail so the river could move the stick.

• The water in the river has enough energy to move the stick since it is flowing downhill.

• Wind could push the stick on the river but could not get to the leaf protected in the pail.

Which of these tools does a meteorologist use to describe the weather?

• A

• B

• C

• D

Scientists always develop a plan when they try to learn something about our natural world. Which sequence correctly shows the steps scientists follow in their plan?

• Make observations -develop and idea - obtain evidence -suggest an explanation.

• obtain evidence - suggest an explanation - develop an idea - make observations

• suggest an explanation - obtain evidence - make observation - develop an idea

• develop an idea - suggest an explanation - obtain evidence - make observations

Which of these is a renewable energy source?

• sunlight

• natural gas

• Uranium

• coal

Madison's life science class was investigating the characteristics of animals. The drawings show three animals Madison was studying. Which physical structures do all three of these animals use for support and movement?

• claws and teeth

• lungs and legs

• bones and muscles

• scales and tails

A student's model of the solar system is shown. Which of these objects would most likely be found between Mars and Jupiter?

• stars

• comets

• asteroids

• dwarf planets