What happens
Light falls on the shiny mirror such as mirror
It will reflect regularly in one direction
Sunlight is gathered into a one point with high temperature when a---------- is used for a period of of time
magnifying glass
A light source found in nature that always gives off light.
Sun
Using Radiation Thermometer
To measure the temperature
Mention two light source
sunlight / fire / electric lamp / torch / stars / flashlight
Gathering the sunlight with a magnifying glass on clothing
This will cause burning of clothes
The direction of shadow is always -----------------to the direction of the Sun
opposite
An object that gives off (emit) its own light
Light source
The ground in sunny places becomes warmer than the ground in shady places.
Bec. the ground absorbs more sunlight than shady places , so the temperature rises
Mention two things that must not be done during the experiment of gathering light
gathering the sunlight on clothes or to the body of living organism
The Sunlight falls on a stake in the schoolyard at the Noon according shadow's length
The shadow will be short
Bothe ------------and ---------------of shadow changes with the Sun's position in the sky.
length / direction
The tool that is used to tell the approximate time based on changing in positions in regular and fixed way.
Sundial
Your shadow completely disappears when you enter your room and turn off the lights.
Bec. the light source is turned off, and no shadow will be formed
Give an example for a surface that make regular reflection and surface that makes irregular reflection
Mirror / wall or desk
The ground surface absorbs more sunlight
The ground's temperature rises)increases and the ground will be less damp (dry)
At sunrise the Sun is-----------in the sky, while at noon the Sun is-----------in the sky.
low / high
A type of reflection that reflects light in many scattered directions.
Irregular Reflection
When light hit an object, the object forms a shadow
Bec. the object blocks the light and and form a dark area called shadow
What is meant by:
1)Shadow
2)Sundial
Shadow: It is the dark area formed when an object blocks the light
Sundial: A tool is used to tell the approximate time based on the changing position of shadows in a regular an fixed way
Direct sunlight hit the thermometer
The measurement will have an error
Shady place are cooler places and often----------compared with sunny places.
more damp
A tool is used to determine the 4 main directions
Compass
People prefer to walk on the shady side of street in summer days.
Bec. the ground of shady places absorbs less sunlight, so its temperature is less than sunny side
Mention the function of:
1)Compass
2)Thermometer / Radiation Thermometer
3)Magnifying glass
1)To identify the four main directions (South, East, West, North)
2)To measure the temperature
3)Gathering the sunlight in a small point and used to details of objects clearly.