1. Fossil fuels areA) a natural resource.
B) renewable.
C) made from minerals.
D)Burned in hydroelectric plants.

2. Which of the fallowing is a consequence of using fossil fuels as an energy source?

A) decreased carbon dioxide levels
B)increased biodiversity
C) increased acid rain
D) decreased ecosystem disruption

3. Which of the fallowing is a renewable form of energy

A) gasoline
B) natural gas
C) wind
D) coal

4. Which of the fallowing activities would contribute the most to global warming?

A)driving a solar-powered car
B)snowmobiling around a national park
C)launching an engine less glider
D)trekking by horseback

5. Which of the fallowing sets of actions will conserve the most energy?

A)caulk windows, use cloth shopping bags, wash clothes in cold water
B)bicycle or walk, turn up thermostat in winter, run water while brushing teeth
C)buy compact fluorescent bulbs, use plastic shopping bags, buy heavily packaged foods
D)insulate walls, buy bottled water, dry laundry in a clothes dryer

20 points and brainliest answer for who answers this correctly

Explanation:

Density is defined as the mass of a substance present in per unit volume.

Mathematically,         Density =

As toothpick, pencil and log are all made up of same wood. So, this means that there will be same composition as amount of mass present in per unit volume will be the same.

Therefore, we can conclude that toothpick, pencil and log all of them will have same density.

Answer:

Explanation:

1. Apple: Characteristics - Red color, round shape, medium size.

- Physical Change: Cutting the apple into slices.

- Chemical Change: Apple slices turning brown when exposed to air.

2. Candle: Characteristics - White color, cylindrical shape, small size.

- Physical Change: Melting the candle wax when exposed to heat.

- Chemical Change: Burning the candle, where the wax reacts with oxygen to produce heat, light, and carbon dioxide.

3. Iron nail: Characteristics - Silver color, cylindrical shape, small size.

- Physical Change: Bending the nail with force.

- Chemical Change: Rusting of the nail when exposed to moisture and oxygen in the air.

4. Ice cube: Characteristics - Transparent color, cuboidal shape, small size.

- Physical Change: Melting the ice cube when exposed to heat.

- Chemical Change: Dissolving the ice cube in water, where the solid water molecules break down into liquid water molecules.

5. Paper: Characteristics - White color, flat shape, medium size.

- Physical Change: Folding the paper into different shapes.

- Chemical Change: Burning the paper, where the cellulose fibers in the paper react with oxygen to produce ash, heat, and carbon dioxide.

It's important to consider the specific characteristics and properties of each item when determining the possible changes they can undergo.

Answer: One idea for one item you could write on SLIME!

Explanation: for an idea for one item, you could do slime for characteristics you could write about the chemical change and of course, since slime sits out, you could write about the physical change for chemical change, you could write about how the chemicals make it smell.

Answer:

True

Explanation:

Ammonium sulfate reacts with barium chloride to produce barium sulfate and ammonium chloride.

Answer:

D. Physics

Explanation:

First, let's define all the answer choices.

Biology: Biology is the study of life and living things. Biology deals with the function, growth, origin and more of organisms.

Chemistry: Chemistry is the study of matter, elements, atoms, compounds, molecules and more. Chemistry is also concerned with chemical reactions.

Planetary science: Planetary science is basically the study of planets. This is the study of planets, moons and planetary systems.

Physics: Physics is the study of matter, energy, and their interactions. This helps us to explain and understand things that happen in the universe.

The best choice is D. Physics. Physics is the study of how matter and energy interact.

Final answer:

The D. Physics is the study of how matter and energy interact. It helps us understand how things work and why they behave the way they do.

Explanation:

Physics is a natural science that explores the fundamental principles governing the universe. It studies the behavior of matter, energy, space, and time through the formulation of physical laws and mathematical equations. Physics covers diverse topics, including mechanics, electromagnetism, thermodynamics, relativity, quantum mechanics, and astrophysics, explaining phenomena from the subatomic to cosmic scales.

Thus, it is the study of how matter and energy interact. It is concerned with describing the interactions of energy, matter, space, and time to uncover the fundamental mechanisms that underlie every phenomenon. In simple terms, physics helps us understand how things work and why they behave the way they do.

Learn more about Interactions of matter and energy here:

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