I have asked this already!!!!!

Answer:

01) Cu tting hair is a physical change. reason-1

02) Cooking can be either one, but I would choose chemical reason-3

03) Ice cream melting is a physical change reason-2

Explanation:

Which travels faster? An echo that forms in water or one that forms in the air?

Select each correct answer. More than one answer may be correct.
Which of the following contributes to the phases of the Moon as seen from Earth?

the Sun lighting different parts of the Moon at different times
the Moon orbiting the Earth
varying amounts of the Moon's lit surface being visible from Earth

What is a feature shared by all animal cells?
Select one:

Animal cells can make sugars using the Sun's energy.

Animal cells have tough cell walls.

Animals cells are eukaryotic.

Animal cells are prokaryotic
_______________________________________________________
The diagram below BEST represents which part of the cell theory?
Select one:

cells are the basic unit of all living things

all living things are made up of cells

Cells come from other living cells

living cells are neither created or destroyed
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Which of the following statements about cells is true?
Select one:

Cells are the basic unit of all living things.

Cells do not have a function in living creatures.

Cells are all the same on the inside.

Cells are all about the same size and shape.

The temperature of a plastic cup is 70ºF. It is filled with water that is 40ºF. Which of the following describes how thermal energy is transferred?

a. Thermal energy is transferred from the cup to the water until they are both at 45ºF.

b. Thermal energy is transferred from the cup to the water until the cup is at 60ºF and the water is at 50ºF.

c. Thermal energy is transferred from the water to the cup until they are both at 45ºF.

d. No thermal energy is transferred between the cup and the water, so the cup will stay at 70ºF and the water will stay at 40ºF.

plssssssssssssssssssssssssssssssheklppppppp

Which of the following images show high air pressure?


A a cloudy sky




B a clear sky




C a clear sky



D a cloudy sky



A) A and B

B) A and D

C) B and C

D) C and D

Design Report
Design a Thermos
It’s time to complete your Design Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U2_ Lab_DesignAThermos_Alice_Jones.doc).
Problem and Constraints
1. What was the problem you tried to solve in your design challenge?
Type your answer here:
2. What were the constraints of the design challenge?
Type your answer here:
Plan
1. Draw a sketch of your design. Include labels and notes about how your design fits the constraints.
Type your answer here:
Test
1. Describe the procedure that you followed to test your design.
Type your answer here:
2. Describe the results of your design test.
Type your answer here:
Evaluation
1. Evaluate your design by describing how well the device performed and whether it met the constraints and solved the problem.
Type your answer here:
2. Revise your design by creating a sketch of an improved model. Describe how the new design is an improvement over the original.
Type your answer here:

Convert all of the following lengths to millimeters.

A. 12 cm = ___ mm

B. 5 inches = ___ mm

C. 1 yard = ___ mm

D. 1 meter = ___ mm

E. 10 feet = ___ mm

Shani poses as the Statue of Liberty for an art class. She holds a torch above her head with her right hand and a book against her side with her left hand. She holds the pose for ten minutes. At the end of the session, she mentions to her friend that it was a lot of work to pose and that her arms are really tired.

Which describes the work Shani did while she posed?(assume the starting work position is when her hand is already raised )

She did more work with her right hand than with her left because the right was held up higher.
She did no work while she posed because she did not move the torch or the book.
She did work while she posed because she was tired at the end of the session.
She did no work while she posed because she did not exert a force on anythi

Could someone pls help me with this too?

Why are astronomers sending telescopes, like the Hubble Space Telescope, into space?



a. It puts the telescope closer to the sun.


b. It allows for the telescope to stay colder.


c. It's cheaper and more efficient to store the telescopes in space.


d. It lessens the effect of the atmosphere.

Jolene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemically?
a) burning the sugar cube with a match stick.
b) crushing the sugar cube and dissolving it in water.
c) dehydrating the sugar cube with sulfuric acid.
d) chewing the sugar cube and digesting it.

NEED HELP! SCIENCE HW IS DUE IN 1 HOUR!!!!!!!!
What type of changes are these and why?
C∪tting hair is a (physical/chemical) change.
Cooking is a (physical/chemical) change.
Ice cream melting in the sun is a (physical/chemical) change.
Options for Reasons
1. Change of state
2. Changes what object is
3. Causes a reaction (signifies chemicals change)

It has been theorized that all of the modern continents on Earth were once part of a single continent. What scientific evidence is used to support this theory?
1) Fossils of similar lifeforms have been found on different continents.

2) The coastlines of some modern continents appear to have once fit together.

3) Some of the continents that exist today have similar types of rocks.

Which on is it?

NEED THIS ANSWER SOONER THAN ASAP!!! HELP PLZ!! Explain how the concepts of energy transformation and conservation of energy allow you to track how energy moves through a system.