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

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!!!!!

How is a Mixture different from a Compound
30 points

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.

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

The force needed to make an object with a mass of 5kg accelerate at 10 m/sec2 = Question 5 options:
500 Newtons 50 Newtons
100 Newtons 10 Newtons

The accepted value for R is 0.08206 L·atm/K·mol or 8.314 L·kPa/K·mol, depending on the unit of pressure used. (Your answer may differ slightly due to rounding.)



How close was your calculation?

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

Do light waves interact with all mediums the same?

Which of the following statements is incorrect?
Select one:

An allele is a type of gene.


DNA is a part of a trait.


Traits are determined by alleles.


A gene is a part of DNA.

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

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

"Give me an example of an idiot."

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?

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.

Please help me with this question!
Am I right?

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

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?

A chemist mixed two substances together: a colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right.

Is the ending substance the same substance as the colorless liquid? What happened to the atoms of the starting substances when the ending substances formed? Be sure to explain your answers to both of these questions.

Does the Applications have high or low viscosity?
Pls help

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.

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

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

Does anyone know how to finish this?

All moving objects have what kind of energy?

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.

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.

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

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.

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.