Question

1. scientists, such as biologists and physicists, study different topics. which choices describes a way in which all scientists act similarly? fields of science

all scientists ask questions about how life on earth is possible.
all scientists ask questions and use evidence to answer them.
all scientists need to receive the same levels of education.
all scientists use similar tools when doing investigations.

1. what is white light? em spectrum

a combination of green and red light
a combination of red, green, and blue light
a combination of red and blue light
a lack of light

1. mechanical waves travel as disturbances in a physical medium. how do electromagnetic waves travel? media

can’t travel in a medium
must travel in a liquid
must travel in a solid
travel as disturbance in em fields

1. toasting bread in a toaster requires energy transformations.

which energy transformations occur in a toaster? energy transformations
chemical to heat
mechanical to heat
electrical to heat
heat to chemical

1. which describes the correct direction of heat flow when you place ice cubes in a warm glass of water? heat

energy is not transferred from ice to the warm water.
energy is transferred from the cold ice cubes to the warm water.
energy is transferred from the outside of the glass to the warm water.
energy is transferred from the warm water to the cold ice cubes.

Explanation:

Question 18

• Option 1: Not all scientists study life on Earth (e.g., physicists studying astrophysics).
• Option 2: The scientific method involves asking questions and using evidence (data, experiments) to answer them, which is a core practice across all scientific fields.
• Option 3: Scientists in different fields (e.g., biologists vs. astronomers) have different educational paths and requirements.
• Option 4: Tools vary (e.g., microscopes for biologists, telescopes for astronomers).

• White light is composed of all visible wavelengths, and in additive color mixing (relevant to light), red, green, and blue (RGB) combine to make white light.
• Other options: Green + red = yellow; red + blue = magenta; "lack of light" is black.

• Mechanical waves need a physical medium (e.g., air, water). Electromagnetic (EM) waves are disturbances in electric and magnetic fields and can travel through a vacuum (no medium required).
• Other options: EM waves don’t need liquid/solid; "can’t travel in a medium" is incorrect (they can travel through media like air, but don’t require them).

Answer:

All scientists ask questions and use evidence to answer them.

Question 19