.

Students in a science lab conducted an investigation. Students recorded the following observations.




Which of the substances produced a chemical change?

Substances 1 and 2

Substances 1 and 3

Substances 1 and 4

Substances 2 and 3

Answer:

It's either Substance 1 or Subatance 4 !

Answer:

Substance 1 and 4

Explanation:

Choose all the answers that apply.

The sun _____.

a. creates energy from fission reactions
b. creates energy through fusion reactions
c. transfers heat through radiation
d. is made of hydrogen and helium
e. uses its own mass to create energy

If all three metals were exposed to extremely high temperatures, which would be the last to melt? (copper, gold, mercury)

jenny turned on the fan in her bedroom. what energy transformation took place when she turned on the fan

A book is sliding across a horizontal tabletop. As it slides, slows down. Which of the following statements best explains this situation?

There is a balanced force on the book caused by gravity.

There is no upward force acting on the book.

There is an unbalanced force on the book caused by friction.

There are no unbalanced forces acting on the book.

Compare and contrast the alkaline battery and a Zinc carbon battery. put in some other facts about them too. write somewhere around 2 paragraphs.



I'll mark brainlyest to whoever has the best answer and give them 50 points for helping me.

How do animals receive the sun's energy?

a. They use the sun's energy to make food.
b. They store solar energy in their bodies.
c. They use the energy stored in plant food.

1. Kylee has been learning that engineering and technology are beneficial to people. She now sees how things people synthesize are useful. The useful materials that benefit people are synthesized from _______.

A.synthetics
B.natural resources

Plz help! The best answer will get brainliest!

What is the net force acting on an object?

When they're trying to solve a problem, engineers follow a series of Question 1 options: problems steps solutions tests

Which of the following statements is true?

a. An insulator speeds up the transfer of heat.
b. Radiation is the transfer of heat in solids.
c. All moving objects experience friction.
d. All work gains some energy as heat.

Which biome has the greatest biodiversity, and why?
MY TEACHER ASKED ME THIS AND WE HAVEN'T EVEN LEARNED ABT THIS!!! PLS HELP I WON'T ACCEPT FAKE ANSWERS I WILL FLAG THEM AS FAKE :

PLZ HELP ME THIS IS ACTULLY SCIENCE BUT PLEASE HELP MEEE
Which of the following are characteristics of soft money? i. donations from individuals and interest group PACs ii. unregulated by the Federal Election Commission iii. goes directly to a political candidate iv. can be used for advertising or other campaign expenses
A. i, ii, iii, and iv

B. i and ii only

C. i, iii, and iv only

D. ii, iii, and iv only

Please select the best answer from the choices provided

WILL GIVE BRAINLIEST! What greenhouse gas most controls the temperature? And when is it released?

Science
The theory of continental drift states that the land masses called continents were once closer together and have drifted apart over time. Which circumstance is the strongest evidence in support of this theory?
Select one:

the periodic climate changes of Earth

the migration patterns of birds

the large variety of animals on each continent

the similarity of fossils on different continents

How do matter and energy move through an ecosystem?

My scientific explanation is:

Your answer should include at least 1-2 complete sentences to explain the claim, evidence and reasoning.
Be sure to check your grammar and spelling.
Use the Sentence Starter to help you:

Matter and energy move through an ecosystem by...

Which statement describes the energy changes that occur when water in a tea kettle is heated on a stove that uses natural gas


A:Some of the chemical energy in the natural gas transforms into thermal energy, which heats the water. Then some of the thermal energy changes into sound energy when the water forms steam and the steam leaves the kettle.

B:Some of the electrical energy in the natural gas transforms into thermal energy, which causes the water to form steam. Then some of the thermal energy changes into sound energy and light energy when the steam leaves the kettle.

To see if it works like they want it to, engineers need to Question 3 options:

test their solution
define their problem
do their research
design their solution

Who inspires you? Who do you aspire to be like?
Shark diving, bungee jumping, or skydiving?
What's your favorite cheesy pick-up line? Have you ever used it in real life?
What's your favorite Disney movie?
What is the weirdest scar you have and how did you get it?
Where did you and your best friend meet?
Which of your accomplishments are you most proud of?
What's the weirdest Wikipedia rabbit hole you've stumbled down?
Tell me about the best vacation you've ever taken.
What's your favorite physical attribute about yourself?
Friday night—would you rather stay in or go out?
Do you believe in ghosts?
What piece of art (book, music, movie, etc.) most influenced the person you are today?
Which would be harder for you to give up: coffee or alcohol?
What's the single best piece of advice you ever received?
Who's your best friend, and what do you love about him or her?
What's the greatest risk you've ever taken?
If you had 24 hours to do whatever you wanted in this city, what would you do?
What do you like about where you work?
What hobby have you always wanted to develop?

What is the largest contributor to the greenhouse effect?

What is an important characteristic for chemicals released into the environment used to seed clouds?

Which of the following statements is true?

a. Kinetic energy depends on mass and speed.
b. Heat and temperature are the same.
c, Atomic energy is the energy in chemical bonds.
d. Work can only be done with potential energy.

Help asap plz! Actual answers plz!

Describe an example of an action and reaction. Identify the forces and their directions.

Can you please help me

Which set of terms best defines what affects kinetic energy and potential energy, respectively?

position, gravity
gravity, velocity
velocity, height
height, position

Before you can solve a problem, the first thing you have to do is Question 2 options:

define the problem
build a prototype
design your solution
test your solution

A student used a portable electric drill to remove screws from a broken wooden table. He noticed that the screws holding the table together were warm to the touch after being removed from the wood. Which statement best explains this phenomenon?
A:Electrical energy from the drill was converted into chemical energy due to conductivity.
B:The process of removing the screw concentrated the thermal energy that was already present in the wood

Why is deforestation an issue for the climate?

HELP PLS THIS IS DUE IN 15 MINUTES PLS PLS PLS!!! I WILL MARK BRAINLIEST IWTH THE BEST ANSWER!!!
List 2 Physical Changes & 2 Chemical Changes and explain why.

What’s the most historic thing that has happened in your lifetime?

Please Help Me!!
Zn + 2HCl --> ZnCl2 + H2 Which of the following provides the best evidence that this reaction follows the law of conservation of mass?