What form of energy cooks s'mores in a solar oven?
A. mechanical energy
B. thermal energy
C. light energy
D. electrical energy
How does energy change form?
A. In a lamp, light energy changes into electrical energy.
B. In a fan, thermal energy changes into mechanical energy.
C. In a television, electrical energy becomes sound and light energy.
D. In an iron, mechanical energy becomes thermal energy.
When using a toaster to heat bread, which forms of energy are present?
A. electrical only
B. electrical and mechanical
C. mechanical and thermal
D. electrical, mechanical, and thermal
which of the following statements about light energy and sound energy is true?
A. Light can travel through empty space, but sound does not travel through empty space.
B. Light travels in waves, but sound does not travel in waves.
C. Neither light nor sound can travel through empty space.
D. Both light and sound energy are produced by vibrations.
Which of the following includes the best materials for creating a wire that will help electricity flow through a circuit and protect eople from heat and electricity?
A. a plastic wire with copper wrapped around it
B. a rubber wire with copper wrapped around it
C. a copper wire with gold wrapped around it
D. a copper wire with plastic wrapped around it
A teacher has a pot of boiling water and a wooden spoon, a plastic spoon, a metal spoon, and a glass spoon. If the four spoons of different materials were placed in a pot of boiling water, which spoon's handle would heat up the fastest?
A. the wooden spoon
B. the plastic spoon
C. the metal spoon
D. the glass spoon
Four thermoses were filled with 500ml of hot tea. Students recorded the temperature of the tea at the start of the investigation and one hour later. Based on the data, which thermos best insulated the hot tea?
A. Thermos 1
B. Thermos 2
C. Thermos 3
D. Thermos 4
Which object would allow the light bulb to light if placed between the battery and wire?
