Science Quiz

Define the term diffusion.

• A process in which air mixes due to the random motion of their particles. Diffusing particles move from an area of high concentration to a area of low concentration

• mixing up of oxygen and carbon dioxide.

• A process in which solids mix due to the random motion of their particles. Diffusing particles move from an area of high concentration to a area of low concentration

• A process in which gases or liquids mix due to the random motion of their particles. Diffusing particles move from an area of high concentration to a area of low concentration

Julia watered her favorite pale yellow flower. She studies the water entering the plant root from the soil. What is this an example of?

• Diffusion

• Osmosis

• Respiration

• Excretion

In the given picture, What is happening in the liver?

• absorption of water

• bile production

• glycogen storage

• lipase production

Fill the given information is the text-based table:
Food Materiel: Starch,?,?

Digestive enzyme: ?,?,?

Source of enzyme: Salivary glands+?,stomach,pancreas

End products: ?,?,Fatty acids+?

• 1)protein,amylase
  2)Amylase,lipase
  ,lipase 3)salivary glands+small intestine 4)glucose/glycerol,pol-ypeptides,fatty acids+protease

• 1)protease,lipase
  2)Amylase,protease,
  fat. 3)salivary glands+small intestine 4)glucose/simple sugar,polypeptides,fatty acids+glycerol

• 1)protein,fat 2)Amylase,protease,lipase 3)salivary glands+small intestine 4)glucose/simple sugar,polypeptides,fatty acids+glycerol

• None of the above.

This phone box has a length of 2.0cm and from the longer side the width is 10cm, as for the other smaller side the width is 5.0. Its mass is 250g. What is the density of the phone box?

• 2.5g/cm³

• 0.20g/cm³

• 0.40g/cm³

• 5.0g/cm³

Define osmosis.

• a process by which molecules shrink.

• A process by which molecules become seperated from a high concentration to a lower concentration.

• a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane.

Jessica takes a ride on her bike for 3 hrs at a speed of 40 km/h. What distance did she travel?

• 1.20 hm

• 90 km

• 120 km

• 100 km