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year 10 Science Homework Week 4

Last updated over 4 years ago

23 questions

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Question 1

1.

What is a positive test for starch?

Iodine turns from orange/brown to blue/black

Iodine turns from blue/black to orange/brown

Benedict’s test turns blue

Benedict’s test turns green, orange or red

Question 2

2.

What is a positive test for simple sugar?

Iodine turns from orange/brown to blue/black

Iodine turns from blue/black to orange/brown

Benedict’s test turns blue

Benedict’s test turns green, orange or red

Question 3

3.

What food group has two different test that can be carried out?

Starch

Simple sugars

Lipids

Protein

Question 4

4.

What food group has uses the Benedict test?

Starch

Simple sugars

lipids

protein

Question 5

5.

What food group has uses the iodine test?

Starch

Simple sugars

Lipids

Proteins

Question 6

6.

What food group has uses the Biuret test?

Starch

simple sugars

lipids

proteins

Question 7

7.

Which of the following are examples of experimental error?

Forgetting to include a battery in your circuit

Using a ruler in inches instead of cm

Room temperature fluctuations

Question 8

8.

Which of the following are NOT examples of experimental error?

A flickering needle on an analogue device

An instrument always reading 2 higher than the true value

Not turning on the switch at the mains

Question 9

9.

Which type of error can be reduced by repeating and taking a mean?

Systematic

Random

Question 10

10.

Which type of error fluctuates above and below the mean value?

Systematic

Random

Question 11

11.

Which type of error causes the reading to be wrong by the same amount each time?

systematic

random

Question 12

12.

Parallax is an example of this type of error?

systematic

random

Question 13

13.

What is “metabolism”?

When a person can eat lots but not put on weight

The sum of chemical reactions in one of your cells or body

The between state for the process of metabolism in the body

Question 14

14.

Which process is being described? The energy is released from the reaction and is then used to power all of these metabolic reactions.

Protein synthesis

Lipid synthesis

Conversion of glucose

Formation of urea

Respiration

Question 15

15.

Which process is being described? Converting glucose into glycogen in animal muscle cells

Protein synthesis

Lipid synthesis

Conversion of glucose

Formation of urea

Respiration

Question 16

16.

Which process is being described? Fatty acids and glycerol are reassembled by cells.

Protein synthesis

Lipid synthesis

Conversion of glucose

Formation of urea

Respiration

Question 17

17.

Which process is being described? Amino acids are joined together.

Protein synthesis

Lipid synthesis

Conversion of glucose

Formation of urea

Respiration

Question 18

18.

Which process is being described? Excess protein is broken down and excreted.

Protein synthesis

Lipid synthesis

Conversion of glucose

Formation of urea

Respiration

Question 19

19.

Diffusion is the…

Movement of particles from an area of low concentration to an area of low concentration

Movement of particles from an area of high concentration to an area of low concentration

Movement of particles between high and low concentration areas

Question 20

20.

Oxygen diffuse from the alveoli to the blood because…

There is a high concentration of oxygen in the alveoli and a low concentration in the blood

There is a low concentration of oxygen in the alveoli and a high concentration in the blood

The alveoli are adapted for this

Question 21

21.

Food that has been broken down diffuses from the small intestines to the blood stream because …

There is a high concentration of food molecules in the blood and a low concentration in the small intestines

There is a low concentration of food molecules in the blood and a high concentration in the small intestines

The holes in the wall of the small intestine are the correct size

Question 22

22.

Diffusion occurs quickest when…

The temperature is uniform

The surface area is small

The concentration gradient is large

Question 23

23.

Diffusion occurs quickest when…

The temperature is high

The temperature is low

The temperature is 37-40oC