Review Unit 1 Physical Science

Photosynthesis is when plants use CO₂ and water to create food, in the presence of sunlight. During photosynthesis

• chemical energy is transformed to solar energy

• solar energy is transformed to chemical energy

• wind energy is transformed to chemical energy

• chemical energy is transformed to thermal energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Lyndon is experimenting with plastic on her windows.

• She puts plastic on a south facing window and takes measurements
• She does not put plastic on a north facing window and takes measurements
• The windows are the same size and design

Why is this not an ideal controlled investigation?

• The window should be different sizes.

• The measurements may be different because the windows are not near each other.

• Measuring temperature is not a good indicator of the plastic keeping out drafts.

• The type of plastic is not mentioned.

Which energy conversion takes place when a solar cell is used to light a street lamp?

• solar energy to light energy

• solar energy to light and heat energy

• solar energy to electric energy to light and heat energy

• heat energy to light energy

Joe has 2 samples of liquids. Sample A has a pH of 4 and sample B has a pH of 6. What can Joe conclude about each of these samples?

• Sample A is acidic and Sample B is acidic

• Sample A is acidic and Sample B is neutral

• Sample A is alkaline (basic) and Sample B is acidic

• Sample A is neutral and Sample B is acidic

Sue has an unknown substance. It has a mass of 13.5 grams and its volume is 5cm³. Which metal is her sample?

HINT: Density=Mass/Volume

• Silver : density = 10.49g/cm³

• Copper: density = 8.96g/cm³

• Iron: density = 7.87g/cm³

• Aluminum: density = 2.7 g/cm³

Salt is dissolved in a flask of tap water. Distilling the mixture causes the salt to separate from the water. Which type of energy is required to begin the distilling process?

• chemical energy

• mechanical energy (motion)

• thermal energy (heat)

• electrical energy

Check all the correct boxes. There are 3 possible answers.

Lee walks through his garden and observes that the shapes of dewdrops are not always the same. Suppose he wants to investigate using the scientific method.

Which questions are testable questions that he can ask to look into the reasons for the different shapes?

• Does the shape of the dewdrop depend on the temperature of the surface?

• Which dewdrop seems to have the most unusual shape?

• Is the material of the surface responsible for the shape of the dewdrop?

• Which shape of dewdrop is the most pleasing to the observer?

• Does the shape of the dewdrop depend on the moisture in the atmosphere?

In this image label 1,2 & 3 using the given energy sources. Click on the image to make it bigger.

• 1= electric 2= kinetic 3= gravitational

• 1 = gravitational 2= electric 3= kinetic

• 1= gravitational 2= kinetic 3= electric

• 1= kinetic 2= gravitational 3= electric

Tags

NGSS.MS-PS3-5

Mike is doing an investigation in the lab. He observes that a sample of liquid turns to a gas at 135°C.

What is this temperature called?

• melting point

• freezing point

• boiling point

Tags

NGSS.MS-PS1-4

Which property of a substance can be determined using a pH indicator?

• boiling point

• density

• electrical conductivity

• acidity