3rd PT REVIEW in Science5

Motion is described in terms of displacement, distance, velocity, acceleration, time and speed. Which of the following is the best example of linear motion?

• A wheel turning

• Dribbling a basketball

• Running around a circle

• Throwing a bowling ball straight down the alley

Why do we need to use the metric system of measurement?

• Because it is easier to understand each other's data.

• Because it is important to describe motion.

• Because it is necessary to describe movement.

• Because it is used by many scientists.

Motion is the change in position of an object with respect to its surroundings in a given interval of time. Which of the following demonstrates motion?

• Ballerina dancing on the stage

• Ball on the floor

• Mother on the street

• Pencil on the table

Motion is a change in position of an object over time. Which of the following demonstrates motion, with the other object as the frame of reference?

• a boy jogging in place

• a boy running on a treadmill

• a dog barking at the garage

• a girl running towards his father

Why do we need to use an appropriate device in measuring lengths?

• To be familiar with the use of each tool

• To be useful

• To have an accurate data

• To have experience using tools like a ruler, meter stick, and tape measure.

Electric currents generate heat as they pass through resistive elements of a circuit. Which of the following materials normally use heat and electricity in order to function?

• Candle

• Electric Stove

• Water heater

• Washing machine

Electricity is the flow of electrical power or charge. Why is electrical wiring usually covered with a layer of plastic?

• to help electricity flow along the wire

• to make it look more beautiful

• to make it safe

• to make it stronger

An insulator is a material which does not easily allow heat and/or electricity to pass through it. Why are cooking utensils made up of metal and the handles are made of plastic?

• Metal is a good conductor while plastic is a poor conductor of heat.

• Metal is expensive while plastic is cheaper.

• Metal is hard while plastic is soft

• Metal is not brittle while plastic is brittle.

When a pot of water is heated, water begins to rise. As the water rises, cold water goes down. What is the transfer of heat from one place to another by the movement of fluids?

• conduction

• convection

• insulation

• radiation

Translucent materials allow light to pass through but objects on the other side cannot be clearly seen. What happens to light when it strikes translucent materials?

• Some lights are transmitted

• The light is blocked.

• The light is absorbed.

• The light passes through.