cells
name 3 cell organelles found in animal cells
Cell membrane
Mitochondria
Ribosomes
Cytoplasm
Nucleus
What are the 2 types of digestion?
Mechanical and chemical.
What does the word 'luminous' mean?
What are 2 signs of a chemical reaction?
Bubbles (gas given off),
Temperature change
Colour change
Name 3 organelles that are found in plant cells but not animal cells.
Cell wall
Vacuole
Chloroplast
What are protein molecules broken down into?
Amino Acids
How can we see planets?
Light from the sun reflects off the planet, into our eyes.
Complete the equation:
Iron + Oxygen -->
Iron Oxide
What are the reactants and products of photosynthesis?
Water + Carbon Dioxide --> Glucose + Oxygen
What is the food test for starch? Name the chemical and the positive result.
You use Iodine solution.
Positive test results shows a colour change from orange to blue-black.
Name all the colours that make up white light and put them in order.
Red, Orange, Yellow, Green, Blue, Indigo, Violet
A substance with more than one type of atom, chemically joined together.
Define diffusion.
Diffusion is the random movement of particles from an area of high concentration, to an area of low concentration.
Name the 3 enzymes that break down;
Lipids (fat molecules)
Proteins
Carbohydrates
Lipase
Protease
Carbohydrase
If you shone white light at a blue filter, what would you see happen and why?
You would see blue light. Blue light is transmitted. All other colours are absorbed.
As you go down group 1 elements, what happens to the reactivity?
As you go down group 1 elements, the reactivity increases.
Muscle cells are a specialised animal cell. Give some features of muscles cell that allow them to do their job well. (what do they have lots of?)
Muscle cells have lots of mitochondria, so more respiration can take place, so more energy is released for contracting and relaxing that allows for movement.
What is the role of stomach acid?
To kill bacteria found on food.
What is the law of reflection?
The angle of incidence = the angle of reflection.
Name all the 3 subatomic particles that make up an atom and state where they are found.
Proton and neutron (nucleus).
Electron (shells).