Describe the three phases of matter.
The three phases of matter are solid, liquid, and gas. A solid has a fixed volume and holds its shape. A liquid has a fixed volume and conforms to the shape of a container. A gas conforms to the shape and volume of a container.
Which organelle is known as the the powerhouse of the cell and explain why.
Mitochondria are the powerhouse of the cell because they produce energy (ATP) through cellular respiration.
Identify the nouns in the following sentence: The red ball was thrown down the long flight of stairs.
The nouns in the sentence are ball and stairs.