Heat — PHYSICS STD 7 — Question

Given below statement is incorrect. Write the correct statement :
When an electric current flows through an electric bulb, the electric energy first changes to light energy and then to heat energy.

Name the type of motion being performed by Earth around the sun.

Given below statement is incorrect. Write the correct statement :
The fossil fuels, wood and biomass are obtained from the dead plants and animals.

Conduction

A rose appears red in white light. How will it appear in
green light? Give a reason for your answer.

State which of the quantities, mass or weight is always directed vertically downwards.

What does’ it mean if we say that a tuning fork has a frequency of 256 Hz?

State the three units of temperature.

Given below statement is incorrect. Write the correct statement :
The path along which the light energy travels in a given direction is called a beam of light.

Given below statement is incorrect. Write the correct statement :
Angle of incidence is equal to angle of reflection for looking glass only.