Name three of the six characteristics of living things
Living things:
- Have cells
- Sense and respond to change
- Reproduce
- Have DNA
- Use energy
- Grow and develop
100
Where do we get all of our energy from?
The sun
100
Name three of the four basic needs that organisms have
Water
Air
A place to live
Food
100
Fill in the blank:
Proteins are large molecules that are made up of smaller molecules called _____________
a) fatty acids
b) carbohydrates
c) amino acids
d) none of the above
c) amino acids
100
Lipids can mix with water. True or False
False. Lipids cannot mix with water.
200
What is a cell?
A membrane-covered structure that contains all of the materials necessary for life.
200
What are producers? Give an example
organisms that can make their own food.
example: plants
200
What percentage of our cells is made out of water?
a)90%
b)70%
c)85%
d)80%
b) 70%
200
What are carbohydrates?
Molecules made of sugars
200
What are two jobs that lipids have in the cell?
- store energy
- form the membranes of cells
300
Every single organism on Earth has more than one cell. True or False
False. There are organisms made up of only one cell; different parts of the cell perform different functions.
300
What are primary consumers? Give an example
Animals that eat plants (producers).
example: cows, horses, rabbits (animals that eat plants)
300
Air is a mixture of several different gases. Name two.
Oxygen and carbon dioxide
300
What is the function of carbohydrates?
They are used by cells as a source of energy and for energy storage
300
What is the difference between fats and oils?
at room temperature, fats are solid and oils are liquid.
400
What is homeostasis?
The maintenance of a stable internal environment
400
What are secondary consumers?. Give an example.
Organisms that eat other organisms.
Ex: cat, dog, tiger, human (any animal that eats other animals)
400
Name the two ways in which organisms living in water get their oxygen.
they either take dissolved oxygen from the water or come up to the water's surface to get oxygen from the air.
400
What are the two types of carbohydrates?
Simple and complex carbohydrates
400
Nucleic acids are large molecules made up of molecules called ________________
nucleotides
500
What are the two ways in which organisms reproduce?
Sexually and Asexually
500
What are decomposers? Give two examples
organisms that get their food by breaking down the nutrients in dead organisms or animal wastes.
example: mushrooms and bacteria
500
What is photosynthesis?
When green organisms convert the energy in sunlight to energy stored in food