Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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

changes in science

How to do a speech

How can you identify a physical change? You can identify a physical change if you can still identify the substance. If it retains its original identity, it is a physical change.
Physical change or chemical? #1 Butter melting in a pan is Physical
Physical change or chemical? #2 Salt dissolves in water Physical
Physical change or chemical? #3 Paper is shredded is physical
Physical change or chemical? Grass cut Physical
Physical change or chemical? A candle is burned is chemical
Physical change or chemical? Fireworks explode is chemical
Physical change or chemical? An apple turns brown is chemical
In the equation Na + O2 → Na2O, what is/are the product(s)? The compound Na2O is the only product in the reaction.
Why do nuclear changes require more energy than chemical changes? To change the nucleus, you must overcome more attractive forces than in a chemical change. Nuclear changes affect the protons in the nucleus; chemical changes affect the electrons surrounding the nucleus.
Created by: Kanekixuta



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