Y8 Basic Chemical Reactions Flashcards
What can chemical reactions produce?
Food and drink.
How can cows make milk?
From the chemical reaction of grass.
Chemical reaction from plants produce ….. that can make cornflakes.
Maize
What can chemical reactions do with food?
It can cook the food.
What are chemical reactions?
It is when atoms are rearranged to form a new substance.
What do all chemical substances have in common?
Make new substances
Transfer energy to or from the surroundings.
Are chemical reactions easily reversible?
No. They are most likely not.
Are all changes chemical reactions?
No: if you melt chocolate, you get melted chocolate but it is still chocolate.
Changes of state are reversible. You can get back with the original state. What is it called?
A physical change.
What do people do to speed up reactions?
Catalyts
What can we use to show chemical reactions?
Word equations.
What are the things that make the new substance?
The reactants.
What is the new substance called?
A product.
How do we know when chemical reactions take place (name 4)?
See huge flames, Get a certain smell Bubbling/fizzing Change of state (energy) Glow/change colour Gases could be given off Getting hotter or colder Hear a gentle fizz.
