Science QA 2

A student wants to determine how the type of surface affects the speed of a toy car. Which tool would be most helpful for measuring the car's speed accurately?

• Stopwatch

• Thermometer

• Beaker

• Hand lens

Ellie threw a frisbee to her friend. Which sentence BEST describes the motion of the frisbee?

• The frisbee flew straight up into the air.

• The frisbee curved through the air toward her friend.

• The frisbee dropped directly to the ground.

• The frisbee bounced off a wall.

Identify the form of energy. Electricity, batteries, and generators are examples of ________ energy.

• Light

• Mechanical

• Heat

• Sound

Which of the following objects produces heat energy? Select ALL correct answers.

• Toaster

• Flashlight

• Candle

• Ceiling fan

Lisa and Brian are testing how long it takes for a marble to roll 50 cm down a ramp. What tools should they use for accurate measurements? Select TWO correct answers.

• Ruler

• Magnifying glass

• Stopwatch

• Thermometer

A group of students rolled a toy car down a ramp. The first time, it took 3.2 seconds; the second time, 3.5 seconds; and the third time, 3.4 seconds. What should the students do to find the MOST accurate result?

• Use the first measurement only.

• Measure again and use the new result.

• Average the three times.

• Repeat the test five more times.

A student wants to test how the amount of water given to a plant affects its growth. Which of the following is the MOST important tool to measure the plant’s growth?

• Thermometer

• Ruler

• Stopwatch

• Graduated cylinder

Maya kicked a ball, and it moved in a straight line across the field. Which sentence BEST describes the motion of the ball?

• The ball moved in a circle.

• The ball moved in a straight line until it stopped.

• The ball bounced back toward Maya.

• The ball flew upward and then stopped.

Identify the type of energy. Windmills, waterfalls, and moving cars are examples of _______ energy.

• Sound

• Light

• Mechanical

• Heat

Which of these objects is primarily used to create light energy? Choose ALL correct answers.

• Lamp

• Television

• Candle

• Whistle