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3 years ago

Which best describes an experiment?

1 answer:

8 0

A: In a lab a scientist measures the height of roses that received different fertilizers.

An experiment must include variables. The other three are just measurements, but since the scientist is varying the types of fertilizers used, this better describes an experiment. It is also done in a controlled environment (in a lab) which helps to eliminate other uncertainties.

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Ike is conducting a scientific experiment involving clear adhesive tape.

Nezavi [6.7K]

Answer:

see if the strips repel each other when brought close together

Explanation:

Electric fields can exert forces on objects, even if the objects involved are not touching. One way to demonstrate that electric fields exist around charged objects is to observe the effects of their forces at a distance.

Since Ike knows that each strip of tape carries a negative charge, he could see if the strips repel each other when brought close together.

8 0

3 years ago

Pathogens are transmitted in only two ways: by direct contact and by vectors.

Marina86 [1]

Answer: False

Explanation:

Pathogens can be transmitted in many ways. It can spread by direct contact, indirect contact, or by vectors.

The mode of transmission can be skin contact, airborne particles, touching a surface, bodily fluids, touched by an infected person.

The mode of transmission can be vector that carries disease and helps in disease transmission.

So, the pathogens can be transmitted by direct contact, indirect contact or by vectors and by many more ways.

4 0

3 years ago

Write the name of things that produces light when they got?

mixas84 [53]

When they got what?

4 0

3 years ago

During which phase of mitosis do the chromosomes coil up and condense

Inga [223]

The phase of mitosis where the chromosomes coil up and condense is at prophase.

4 0

3 years ago

Which statement correctly compares mass and weight?

hram777 [196]

Answer:

D. Weight varies with location, but mass does not vary

Explanation:

Weight can be defined as the force acting on a body or an object as a result of gravity.

Mathematically, the weight of an object is given by the formula;

$Weight = mg$

Where;

m is the mass of the object.
g is the acceleration due to gravity.

Mass can be defined as a measure of the amount of matter an object or a body comprises of. The standard unit of measurement of the mass of an object or a body is kilograms.

Irrespective of the location of an object or a body at a given moment in time, the mass (amount of matter that they're made up of) is constant. This ultimately implies that, whether you're in the moon, space, earth or any other place, your mass remains the same (constant).

<em>Hence, the statement that correctly compares mass and weight is that, weight varies with location, but mass does not vary. This is simply because acceleration due to gravity changes with location i.e its value varies with the planets.</em>

5 0

3 years ago