CA2 SBB

A colorful and engaging quiz interface featuring science symbols like test tubes, chemical structures, and biological diagrams, set against a backdrop of a classroom or laboratory.

CA2 SBB Science Challenge

Test your knowledge with our engaging quiz designed to challenge your understanding of science concepts! This quiz covers various topics, including chemistry, biology, and the principles of chromatography.

16 thought-provoking questions
A mix of multiple choice and open-ended queries
Designed for students and science enthusiasts alike

16 Questions4 MinutesCreated by ExploringScience254

1. X melts at 53 oC and boils at 100 oC. It is insoluble in water and does not react with water. State a method to separate a mixture of substance X and water.

Filtration

Simple distillation

Paper chromatgraphy

Crystillation

2 (c) Besides using chromatography, suggest how else the scientists can prove that the bank note in (b)(i) is a pure ink.

Use filitration to see if there is any residue left

No other methods can be used

Boil the ink to see if it has a fixed boiling point.

Use UV rays to detect any impurities

2 (d) Suggest why water is not used as a solvent to use for this chromatography in comparing the inks in bank notes.

Water will destroy the ink

A stronger solvent should be used

Inks in bank notes cannot react to water

Inks in bank notes are insoluble in water

2 (d) Explain why the starting line is drawn in pencil.

Pencil can be erase easily if drawn wrongly

Pencil contains carbon. Carbon is a pure substance, cannot be separated Does not intefer with results.

Pencil does not leave any marking on the paper chromatogram

Pencil allows the ink to travel faster up the paper chromatogram

3 (a) Which type of evaporation would be suitable to extract pure solute A from the mixture solute A and water?

Question 4(a)

A: cytoplasm B: nucleus C: cell wall

A: cytoplasm B: cell membrane C: nucleus

A: cytoplasm B: nucleus C: cell membrane

A: vacuole B: cell membrane C: cytoplasm

4 (b) How is the structure of red blood cell differs from a white blood cell.

Absence of nucleus

Absence of cytoplasm

Absence of cell membrane

Absence of small vacuoles

4 (c) Which of the following is not an explanation of the structure of red blood cell to its perform its function.

No nulceus to carry more oxygen

Contain haemoglobin which can combines with oxygen.

No nucleus to pack more haemoglobin.

Biconcave to increase surface area to volume ratio for diffusion of gases

5 (a) Identify the type of cells A and B

A: red blood cell B: root cell

A: blood cell B: nerve cells

A: red blood cell B: root hair cell

A: xylem cell B: nerve cells

5 (b) Which part contains the chromosome.

Nucleus

Cytoplasm

Chloroplast

Large central vacuole

6 (a) Explain what labour of division is.

Many cells come together to perform a task more efficiently

Breakdown of workload into smaller and more specific tasks for maximum efficiency

Each cell is modified to perform a specialised task

Combining of workload into more specific tasks for maximum efficiency

6 (b) Which of the following is not an example of 'division of labour' in cell

Nucleus

Chloroplast

DNA

Vacuole

6 (c) Which of the following is not an example of 'division of labour' in an organsim?

Red blood cell

Nerve cell

Root hair cell

Animal cell

CA2 SBB

CA2 SBB Science Challenge

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