If two objects have different temperatures, heat will flow from the warmer object to the cooler one until _________________________.
A. one reaches a temperature of zero
B. one runs out of energy
C. they reach the same or equal temperature
D. one is absorbed into the other

Notice the populations decrease as you go from the bottom of the food chain to the top. Why do you think this is so? PLZ HELP!!!!!

A student determined that a 50mL sample of an unknown liquid had a density of 1 g/mL. A 100mL sample of the same liquid would have a density of 2 g/mL. True or false

Think about the tools, maps, and models Scientist use to collect data. Describe some of these different weather instruments and how they are used to forecast weather.

please help!

An engineering team designs a rocket that flies faster and requires less fuel than other rockets. However, the rocket explodes the first time it is launched. Which step of the engineering process would have shown that there was a potential problem?


A.

Evaluate the results.


B.

Make a plan.


C.

Know the background.


D.

Do the work.

Expensive to sort and transport (is what energy source?)
A. WInd
B. Solar
C. Nuclear
D.Geothermal
E. Biomass
F. Hydropower
G. Fossil fuels

Observe the activity in your classroom. You can observe people, objects in the room, parts of your actual classroom, to begin noticing changes in matter. Collect data for two examples of changes in matter. Use the Changes in Matter to determine if your examples are physical or chemical changes. Your answer should include a description of each food preparation, as well as evidence for which type of change it is. You can use this format:

Example 1:

Type of Change:

Evidence

Temperature, density, and pressure ______________ (increases, decreases) as depth ____________ (increases, decreases).

How might you use hard candy to model how magma forms new rock?

Does the Applications have high or low viscosity?
Pls help

When the following equation representing a reaction, is completed, the products are: Na2CO(aq) + 2HCl(aq)→

A. NaCl and H2O
B. H2O and CO2
C. NaCl, CO2, and H2O
D. NaCl, CO2, and H2

Which of the following best describes chicken noodle soup?
A.Element
B.Mixture
C.Compound
D.Solution
50PT

Please help me-
A space shuttle is covered with two layers of carbon. The two layers are the same size and have the same number of molecules. When the space shuttle is sitting on the ground, the layers do not touch, as shown in the diagram above. When the space shuttle takes off, the layers move so that they are touching. Use the information in the diagram to answer the question.

How does the temperature of the outer layer compare with the temperature of the inner layer before the layers touch? What will happen after the layers have been touching for a while?

A.Before the layers touch, the outer layer is hotter than the inner layer. Once the layers are touching, the outer layer will transfer kinetic energy to the molecules in the cooler inner layer until both layers reach the same temperature, which will be in between their starting temperatures.
B.Before the layers touch, the outer layer is hotter than the inner layer. Once the layers are touching, the cooler inner layer will gain kinetic energy until the molecules of both layers have an energy of 90, because hotter things increase the temperature of cooler things.
C.Before the layers touch, the outer layer is cooler than the inner layer. Once the layers are touching, the inner layer will transfer kinetic energy to the molecules in the cooler outer layer until both layers reach the same temperature, which will be in between their starting temperatures.
D.Before the layers touch, the layers are different temperatures. Once the layers are touching, kinetic energy and cold energy will transfer between the molecules in the two layers until both layers reach the same temperature, which will be in between their starting temperatures.

Scientists study the dark lines in a star's spectrum to identify _____.

the star's name
the age of the star
the star's origin
elements in the star

Help please its due in 2 minuntes.

Two plant reproductive parts are described below.

Part 1: The tip of the female reproductive part that receives pollen from the stamen
Part 2: The male reproductive part that produces pollen

Which statement is true about the parts?
Question 8 options:

Part 1 is the stamen and Part 2 is the pistil.

Part 1 is the stigma and Part 2 is the ovule.

Part 1 is the ovule and Part 2 is the stigma.

Part 1 is the stigma and Part 2 is the stamen.

The picture below shows a flower experiencing phototropism, a type of growth movement.



Which of the following best explains the external stimulus that is causing the response in the picture?
A.
The plant, stimulated by light through the window, is responding by growing toward that light.
B.
The plant, stimulated by a need for water, is responding by its roots pushing out of the soil to search for water.
C.
The plant, stimulated by indoor air, is responding by growing toward the preferred outdoor air.
D.
The plant, stimulated by a need for growth, is responding by trying to leave its pot because of lack of space.

Valence electrons will either ______________ or ______________ to form molecules.

Observe the activity in your classroom. You can observe people, objects in the room, parts of your actual classroom, to begin noticing changes in matter. Collect data for two examples of changes in matter. Use the Changes in Matter to determine if your examples are physical or chemical changes. Your answer should include a description of each food preparation, as well as evidence for which type of change it is. You can use this format:

Example 1:

Type of Change:

Evidence

Carbon monoxide (CO) _____.

is an element
is made of two oxygen atoms and two carbon atoms
increases in volume when compressed
is a compound made of oxygen and carbon

Do light waves interact with all mediums the same?

Which of the following are examples near a Convergent Boundary? (check all that apply)

A. Trenches may form here
B. The mid-Atlantic ridge
C. A rift valley may form here
D. Tall mountains may form here
CHOOSE ALL THAT APPLY

Which of the following statements is true?

Elements in the same period have similar properties.
Elements in the same group have the same number of electron shells.
The periodic table lists elements in ascending order of atomic numbers.
A molecule must be made of two or more different elements.

What if you were given a periodic table like the one above with no labels, just colors? How could you use the physical characteristics to identify an element as a metal, nonmetal, or metalloid?

Nitrogen (N) has an atomic number of 7 and an atomic mass of 14. Which of the following correctly shows the electron arrangement for nitrogen?

2, 7
2, 5
2, 2, 3
2, 8, 4

Which is the most likely to be reduced?
A. Cu2+
B. Fe3+ C. Fe2+
D. Zn2+​

Explain how you could decrease the thermal energy of a can of soup you just took out of the pantry.

Write the definition of digital in your words.
Will get brainliest.

WILL GIVE BRAINLIST

students set up three trials of an experiment to test the effect of the amount of water on beam plant growth. In each trial, five plants each receive one of three amounts of water. after one week, students measure the change in each plant's height. The table summarizes their data.

Sarcasm Challenge! answer the question the most sarcastic to get a Brainlyest!

"Give me an example of an idiot."

You eat a sandwich. What molecule does your cells need from this sandwich, and how does that molecule get from the sandwich to your cells?

Don't look anything up

HELP ME!!- What if you were given a periodic table with no labels, just colors? How could you use the physical characteristics to identify an element as a metal, nonmetal, or metalloid?