# data[].attributes.body
1.Your body is opaque so light hitting your body is __absorb____ or reflected

2.two sources of light

lamp,sun

Oscar

# data[].attributes.headline
Ryan-How to reduce the resistance of a Car?

# data[].attributes.subject
Ryan-How to reduce the resistance of a Car?

# data[].attributes.body
Danielwu：Be streamlined

# data[].attributes.body
What the properties of liquids?

Yolanda: The particles are close to each other, slide around each other

# data[].attributes.body
1.Johnny’s mask has a mass of 100g and a volume of 230cm squared. What is the Density?

2. Only solid’s particles don’t move. True or False. Why?

# data[].attributes.body
Question 1: why metal can’t float on water?

because the density of metal is greater than that of water.（vickie）

Question 2: why light travel through air to water will produce refraction?

because light is refracted when it spreads through air into water, because light is in a uniform medium when it propagates in the air, and when it enters the water, the density of the medium changes from lower density air to higher density water.（vickie）

# data[].attributes.body
What is relationship of air resistance and speed?

Danielwu：The faster the speed, the greater the resistance

# data[].attributes.body
1.How pressure in a fluid changes with depth.

increase.Oscar

2.why an object floats

Because of its low density.Oscar

# data[].attributes.body
A Tv transfer 300J, 50J for pictures, 60J for sounds, others for heat. Can you find the efficiency?

36.66666666666667J -- Yade

# data[].attributes.body
1)How energy is being transferred through the pan in part

conduction

2)The air resistance of a car can be reduced by what

let the streamline shape

kevin

# data[].attributes.body
In different densities of matter，what is relationship of angle of incident and angle of refraction

Science relationship

# data[].attributes.body
Refraction is what happens when light？

Angelia

Light refraction

Why the iceberg can floats on the water？

Angelia

Because the density of ice is relatively small and the density of water is relatively high, the ice will float on the water.

# data[].attributes.body
Question （Ria）

1️⃣ Explain why an object float

Danielwu：Because it's less dense

2️⃣Explain how density affects the way an object floats

Danielwu：Low density will float, high density will sink

# data[].attributes.body
1.Why does foam float in water?

Because the density of foam is smaller than that of water

2.What is the density of water?

水的密度是1g/cm&#179;,10&#179;kg/m&#179;（t=4℃）。

Susan

# data[].attributes.body
Light rays are scattering by paper

Light is Absorption or reflection by opaque objects

--Yade

Because Light is Absorption or reflection by opaque objects

—Raymond

# data[].attributes.body
1.light rays are___by rough surfaces

2.Identify upthrust as a force

# data[].attributes.body
为什么金属不能浮在水面上

金属的密度大于水的密度。

光是直线传播的吗？。

Yes,light transfer in straight line (vickie)

# data[].attributes.body
idbvjhdb

# data[].attributes.body
what is The difference of Liquids and gases

# data[].attributes.body
Light will radiate through glass or pass through

# data[].attributes.body
light Are ________by a _______line

Light are faster then______

joe

1，moov，straight

2，sound

# data[].attributes.body
a boy but ice cream on desk, what is the energy transfer way and how

kevin

# data[].attributes.body
Why dose light refract？

# data[].attributes.body
How is translucent material different from a transparent material?

A.a translucent material transmits light

B.a translucent material absorbs all light

C.a translucent material absorbs some light and the rest is reflected

D.a translucent material scatters light as it passes through

What’s the properties of solids liquids and gases ?

# data[].attributes.body
what is the name for thing measure tempreture

Danielwu：thermometer

# data[].attributes.body
1.What dose power mean?

2.What is the three states of matter?

# data[].attributes.body
What does this instrument measure? Tick one box.

A length

B degrees

C heat

D temperatu

D- Jason

# data[].attributes.body
Two properties of solids

# data[].attributes.body
1.What determines density?

2.The phenomenon and properties of light?

1:mass volume

2:The speed is faster than the sound

Amy

# data[].attributes.body
1.There are several states of matter?

2.what are the different states of substances?