Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

Username is available taken
show password

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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


Problem Solving terms

What is a control experiment? A standard for comparison proving that XXX (independent variable) is responsible for the YYYY (result)
How do you increase Reliability Repeat the experiment and calculate an average
How do you increase Validity Ensure that variable are kept constant TTCMVP
Why do you repeat experiments To increase Reliability
Why do you calculate percentage change in mass To eliminate any variation in starting mass
Why do you calculate dry mass To eliminate any variation in water content
Why do you leave the experiment for 10 minutes before starting? To allow time for......1. diffusion to take place, 2. enzyme to breakdown the substrate, 3. inhibitor to have its effect, 4. solutions to reach correct temperature, 5. pressures to stabilise
Why do you calculate average results? To increase Reliability
How do you set up a control Use the exact same apparatus in the exact same way but replace XX with water/dead cells/different enzyme etc
How do you calculate percentage change? change/original x 100
If you earn £80 in 4 hours what is your average earning per hour? £20 per hour
Should you always include units with numbers? YES
Created by: nscobie
Popular Biology sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards