Question

is a type of passive transport while osmosis is a type of active transport
question 3 (mandatory) (1 point)
in the diffusion of dye in water experiment, what variable did we test for that affected rate of diffusion? how did it affect rate of diffusion?
options:

• temperature; higher temperature results in slower rate of diffusion
• temperature; higher temperature results in faster rate of diffusion
• viscosity; higher viscosity results in faster rate of diffusion
• viscosity; higher viscosity results in slower rate of diffusion

question 4 (mandatory) (1 point)
in the dialysis bag experiment, which sac didnt gain or lose weight? why?
options:

• sac 2; because there is equal concentration of glucose in the bag and the beaker
• sac 2; because glucose cant travel from inside the bag into the beaker
• sac 1; because there is equal concentration of glucose in the bag and the beaker
• sac 1; because glucose cant travel from inside the bag into the beaker

Explanation:

Question 3

In diffusion, temperature is a tested variable. Kinetic energy of particles increases with temperature. Higher kinetic energy means particles move faster, so higher temperature increases diffusion rate. Viscosity (thickness) slows diffusion (higher viscosity → slower), so the correct option links temperature to faster diffusion.

Question 4

In dialysis (osmosis/diffusion), net movement of water (weight change) occurs due to concentration gradients. If glucose concentration is equal inside (sac) and outside (beaker), there’s no net osmosis (water movement), so weight doesn’t change. Sac 2 would have a gradient (if glucose could move, but glucose is large; however, the option with equal concentration and no weight change is sac 1 with equal glucose concentrations.

Answer:

temperature; higher temperature results in faster rate of diffusion