CHEMISTRY MIDDLE SCHOOL

How can you demonstrate that a piece of chalk has mass?

Answers

Answer 1
Answer: You can demonstrate that a piece of chalk has mass by putting it on a pan scale. Pan scales determine mass in grams. Also if the mass feels like it has some weight to it (although not to be confused with weight, they are two different things!), it most likely has mass.
Hope this helps!!

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In an oxidation-reduction reaction, the number of electrons lost is(1) equal to the number of electrons gained (2) equal to the number of protons gained (3) less than the number of electrons gained (4) less than the number or protons gained
The periodic table has undergone some changes since it was first introduced. List three ways the modern periodic table differs from the one first published by Mendeleev in 1869.I have two of the three ways: 1: updating the atomic weight2: adding newly discovered elementsHowever, I cannot come up with a last way the modern periodic table differs from Mendeleev's. Please help (:
Democritus said that ____ were indivisible, fundamental units of matter
Beginning with an explanation of gravity's effect on a nebula, explain how we humans owe our existence to gravity.
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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

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

74. Which two temperatures are identical for the same substance?(A) melting point, freezing point
B) melting point, boiling point
C) freezing point, boiling point
D) freezing point, condensation point
​

Answers

Answer:

(A) melting point, freezing point.

Explanation:

For the same substance: when matter is transitioning from solid to liquid (melting) or liquid to solid(freezing), its temperature is fixed at the melting/freezing point, which is the same temperature.

Answer:melting,freezing

Explanation:

What scientists do that is the basis for their investigations

Answers

Scientists conduct investigations based on systematic observations, research questions, and the development of testable hypotheses.

What isd the wprk of scientists

They design experiments, collect data, and analyze it using statistical methods. Peer review and replication are important for ensuring the validity of findings.

Scientists collaborate, communicate their results, and develop theories to explain natural phenomena. The scientific method and critical thinking are central to their work.

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Scientists use curiosity, imagination, and previous scientific study to create research questions and hypotheses to begin their investigations into natural phenomenon. They use this process which formally is called the scientific method to carefully construct experiments to guide investigations of the world around them. 

When there are equal forces from opposite directions acting on an object, the forces are said to be which of the following?Positive
Negative
Balanced
Gravitational

Answers

Answer:

balanced

Explanation:

Final answer:

When equal forces from opposite directions act on an object, they are said to be balanced. Such a state doesn't change the motion of the object, which aligns with Newton's First Law of Motion or The Law of Inertia.

Explanation:

Balanced forces occur when the total force applied to an object from one direction equates to the total force applying from the opposite direction. Hence, the object will remain still or continue moving at a constant speed in a straight line. It's important to note that under balanced forces, the motion state of the object doesn't change, also known as Newton's First Law of Motion or The Law of Inertia.

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A pogo stick bounces 30 M in 10 secs what is the bouncers average speed?

Answers

three  i hope this helps
i would love to help but it is 3 or is it 3 million?

A self-contained living thingA. Ecosystem

B. Organism

C. Competition

D. Population

E. Resources​

Answers

The correct answer Organism
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