Concept 2- Homeostasis and Regulation

Concept 2- Homeostasis and Regulation

Multiple Choice

Something that takes up space and has mass.

• volume
• matter
• mass
• density

Multiple Choice

The basic unit of a living thing is a ________________.

• cell

• cytoplasm

• nucleus

• cell membrane

Multiple Choice

All living things are made of of tiny structures called cells.

• true
• false

Multiple Choice

Polar molecules have

• no charges.

• slight positive and negative charges on opposite ends of the molecules.

• only positive charges.

• either positive or negative charges, but not both.

Multiple Choice

A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons is a _______________.

• nonpolar molecule

• polar molecule

• ionic compound

• metalic compound

Multiple Choice

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Multiple Choice

Describe COHESION.

• Water molecules attracted to other substances.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances because of its polarity.

• Water molecules attracted to other water molecules.

Multiple Choice

When something is 'water fearing' it is....

• Hydrophobic
• Hydrophilic 
• Hydroelectric 
• Hydrochloric

Multiple Choice

If a surface absorbs and attracts water molecules it is....

• clear

• a leaf

• hydrophobic

• hydrophilic