transport and energy Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
What do cells get from their environment? | food, oxygen, water, and other substances |
What do cells release from their environment | waste materials |
Materials are moved into and out of the cells by the ____________. | cell membrane |
What does it mean by "cell membranes are semipermeable?" | It means that some materials can pass through and others cannot and they act like a kitchen strainer |
True or False: Do cell membranes have pores like our skin that allow small particles to pass through, but the larger particles get trapped and cannot pass through the membrane? | True |
True or False: Are molecules not constantly on motion? | False: molecules are constantly on motion and as they move they spread out or diffuse |
Diffusion | when particles move from an area of high concentration to low concentration (particles move from where there were many to where there are few) |
What is diffusion also called? | passive transport |
Does this process use energy? | NO! |
What is and example of diffusion | food coloring spreading in water |
Equilibrium | molecules of a substance are spread out evenly throughout a space and the molecules continue to move |
Osmosis | the diffusion of water across a membrane |
Active transport | is the opposite of diffusion; particles move from an area of low concentration to high concentration (from where there are few to where there are many |
Does active transport use energy? | yes |
Active transport also includes... | the movement of LARGE particles across a membrane |
Example of active transport | plant cells taking in minerals from the soil even though they already have lots of minerals |
Endocytosis | the cell membrane folds to make a sphere around excessively large molecules; the sphere pinches off and forms a vacuole with the molecules in side; the vacuole floats around in the cytoplasm |
Example of endocytosis | the cell membrane uses this process to allow large materials to enter the cell |
Exocytosis | the Golgi bodies move packaged waste products to the cell membrane; the package fuses to the cell membrane; wastes are released outside the cell |
Where do organisms get their energy? | from the food they eat and cells that take chemical energy stored in food and change it into other forms so it can be used during metabolism |
Metabolism | the total of all chemical reactions that take place in an organism |
Examples of metabolism | photosynthesis, respiration, digestion |
What are the two groups that organisms are divided into? | producers and consumers |
Producers | organisms that can make their own food |
Ex. of producers | plants |
Consumers | organisms that cannot make their own food |
Ex. of consumers | animals and fungi |
Photosynthesis | the process that producers use to change light energy from the sun into chemical energy that cam be used |
What does the energy in the sun change? | it changes carbon dioxide and water into glucose (sugar) and oxygen |
What is glucose? | used as food by the plant |
What is oxygen given off as? | waste products |
Chlorophyll | a green pigment that traps the sunlight |
Where does photosynthesis take place? | in the chloroplasts |
What is the chemical equation for photosythesis? | energy + 6H2O + 6CO2 -> C6H12O6 + 6O2 energy + water + carbondioxide -> glucose + oxygen |
What do consumers have to do to take in stored energy from food? | eat producers (plants) or eat other consumers who have eaten plants |
A food chain shows... | the flow of energy throughout the ecosystem |
Respiration | all living things do it to release energy from food; all organisms nee some way of releasing energy from food to be able to use it |
Aerobic respiration | requires energy |
Where does aerobic respiration take place? | the mitochondria |
What happens during respiration? | food molecules (glucose) and oxygen get broken down and carbon dioxide, water, and energy (ATP) are given off as waste products |
Is respiration the opposite of photosynthesis? | yes |
Created by:
rhs0214
Popular Science sets