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year 10 Science Homework Week 4
By Naomi Arthur
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Last updated over 4 years ago
23 questions
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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
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
What food group has two different test that can be carried out?
Starch
Simple sugars
Lipids
Protein
What food group has uses the Benedict test?
Starch
Simple sugars
lipids
protein
What food group has uses the iodine test?
Starch
Simple sugars
Lipids
Proteins
What food group has uses the Biuret test?
Starch
simple sugars
lipids
proteins
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
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
Which type of error can be reduced by repeating and taking a mean?
Systematic
Random
Which type of error fluctuates above and below the mean value?
Systematic
Random
Which type of error causes the reading to be wrong by the same amount each time?
systematic
random
Parallax is an example of this type of error?
systematic
random
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
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
Which process is being described?
Converting glucose into glycogen in animal muscle cells
Protein synthesis
Lipid synthesis
Conversion of glucose
Formation of urea
Respiration
Which process is being described?
Fatty acids and glycerol are reassembled by cells.
Protein synthesis
Lipid synthesis
Conversion of glucose
Formation of urea
Respiration
Which process is being described?
Amino acids are joined together.
Protein synthesis
Lipid synthesis
Conversion of glucose
Formation of urea
Respiration
Which process is being described?
Excess protein is broken down and excreted.
Protein synthesis
Lipid synthesis
Conversion of glucose
Formation of urea
Respiration
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
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
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
Diffusion occurs quickest when…
The temperature is uniform
The surface area is small
The concentration gradient is large
Diffusion occurs quickest when…
The temperature is high
The temperature is low
The temperature is 37-40oC