Which of the following best shows gas state of matter?
Question 5
5.
Question 6
6.
A man fishing in a boat on a lake sees a n image of an airplane in the water. At the same time he hears a plane and turns to see the source of the sound in the sky.
Which property of light best explains why an image of the plane appears in the water?
Conduction
Reflection
Absorption
Refraction
What is wrong with the circuit below?
The light is not big enough.
It needs more wires.
The circuit is not closed.
Another energy source is needed.
What is the energy of moving particles that produce heat?
Mechanical energy
Thermal energy
Electrical energy
Sound energy
Which of the following is a description of a solid substance?
Substance A has a definite shape and definite volume.
Substance B takes the shape of its container and has a definite volume.
Substance C takes the shape of its container and does not have definite volume.
Substance D does not exist.
Determine if the items on the left are soluble or insoluble.
soluble
insoluble
metal key
baking soda
tempera paint powder
sugar cubes
Breaks down into tiny pieces when mixed with water
Its appearance most likely changes when mixed with water.
The substance dissolves.
The substance does not dissolve.
Does not break down into smaller pieces when mixed with water