Which of the following is true about mixtures?A) Mixtures consist of two or more substances chemically combined.
B) Mixtures cannot be separated by physical means.
C) Mixtures consist of only one kind of atom.
D) Mixtures have to or more substances mixed together, but are not chemically combined.

Answers

Answer 1

Answer: The correct answer is D. Mixtures can be easily separated solutions cannot.

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After decaying for 48 hours,1/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope?
When are tides highest? a. during the moon’s first quarter phase b. when the sun, Earth, and the moon are nearly in a line c. during the moon’s third quarter phase d. when the moon is at a right angle to the sun
How does the environment influence natural selection?
A flashlight battery is an example of a...?

Why do frogs have such small cerebrum?

Answers

The cerebrum is part of the brain that controls the functions of the voluntary activity in the body. If an organism is smaller than another organism, for this case a frog and a rabbit. It means that the frog and the processes inside that body are less complex. Thus, the cerebrum do not need to be bigger than the cerebrum of a bigger organism.

Is 2 pounds bigger than 80 ounces

Answers

no because 2 pounds only equals 16 ounces times 2 so it equals 32 ounces which is not bigger than 80

no because 2 pounds is 16

What are two actions that would cause an increase in relative humidity

Answers

relative humidity increases when the amount of moisture air can hold increases.The increase can be caused by the introduction of more moist air OR a temperature drop of the air/moisture mixture without a loss of moisture. Colder air will hold less moisture than warm air;as the temperature goes down the amount of moisture relative to what the air can hold increases

Answer:

cooler air

Explanation:

Is the unlimited source of energy for all living things is the leaf. Is that true or false

Answers

Uhh...
.
Do we eat leaves?
.
I mean, yeah, we do... basil leaves...
.
but really, what gives leaves energy?
.
huh?
.
I can't hear you.
.
Think again.
.
Say it aloud!!
.
LOUDER.
.
Yup. The sun.
.
The sun never ends. See, the sun provides energy for plants. animals eat plants. we eat plants and animals.
.
No sun?
.
we dead

Which occurs during summer in the Northern Hemisphere? A. The earth is closer to the sun. B. The earth's axis is tilted so that the Northern Hemisphere faces the sun. C. The earth's axis is tilted so that the Northern Hemisphere faces away from the sun. D. The earth is farther away from the sun.

Answers

The answer is B. The earth's axis is tilted so that the Northern Hemisphere faces the sun. Hope this helps and good luck! :)

Daniel observed and compared some stars at night and recorded his observations in a chart.Daniel later discovered that star X is farther away from Earth than the other stars he observed, and star Z is closest to Earth.

Which conclusion is best supported by Daniel’s observations and discoveries?

Star X is more luminous than both stars Y and Z.
Star X is more luminous than star Z, but not star Y.
Star Y is more luminous than star X.
Star Z is more luminous than star Y.

PLEASE HELP