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REVIEW SCIENCE FINAL TEST SEMESTER 1
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When a candle burned, wax reacts with oxygen to form carbon dioxide and water vapor. The .... are wax and oxygen
Reactant
If the surface area of an object INCREASE, the upthrust will INCREASE and the object is likely to float. Is the statement true or false?
true
The force showed by Y is...
Friction
An object with mass 100 kg stand on earth (gravity 9.8 N/kg). The weight of the objec
980 N
Weight will change if the gravity change. Is the statement true or false?
true
Weight is a measure of the amount of matter. Is the statement true or false?
false
A melting ice cube is an example of (physical/chemical) change that is (reversible/ irreversible)
physical, reversible
Three evidence that chemical reactions have taken place are....
A gas being produced, a change in colour, a change in temperature
Boiling occurs at all temperatures, while evaporation occurs when liquid reaches a certain temperature. Is the statement true or false?
False
The picture shows the process of....
boiling
Any material that does not allow electric current to pass through it called ....
Electrical insulator
The force gravity showed by ... and drag showed by ...
gravity : P, Drag : S
Its happens because water ... than air
denser
The image shows that light travel from ... to ...
air to water
A ray of light changes in direction when it bounces off a surface. Is the statement true or false?
true
When light falls on a smooth surface, all the light is refracted in one direction. Is the statement True or False
False
The picture shows example of...
Refraction
We can see our image on a mirror because of....
reflection
Lift force shown by....
R
Making a cake is an example of chemical change that is reversible. True or false?
False
In REFRACTION light ray change in ... and ....
speed and direction
The egg was put in a glass of vinegar. It produces some bubbles. The product of its chemical reaction is....
bubbles