Match the best method to separate the parts of each mixture….
Boil the water. Collect the solid.
Dissolve salt in water. Pour through filter paper and collect the sand.
Remove iron filings with magnet.
Use a screen to sift and separate the big pieces from smaller pieces.
Pick out the bigger particles.
Add water and float one type of particle.
Answeres
l
l
l
l
l
V
Sand and salt
Gravel and rocks
Sand and gravel
Sand and iron filings
Sand and wood shavings
Sugar water
The Correct Answer and Explanation is:
Here’s the correct matching of methods for separating the parts of each mixture:
- Boil the water. Collect the solid. – Sugar water
Explanation: To separate sugar from water, you would boil the water to evaporate it, leaving behind the sugar. This process works because sugar dissolves in water, and when the water evaporates, the sugar remains as a solid. This technique is often used to separate a soluble solid (sugar) from a solvent (water). - Dissolve salt in water. Pour through filter paper and collect the sand. – Sand and salt
Explanation: In this method, salt dissolves in water while sand does not. By filtering the mixture, the sand will stay on the filter paper, and the saltwater will pass through. After the water is evaporated from the saltwater, the salt can be recovered. This method separates an insoluble solid (sand) from a soluble solid (salt). - Remove iron filings with magnet. – Sand and iron filings
Explanation: This technique uses a magnet to attract iron filings, which are magnetic, while leaving the sand behind. It’s a simple and effective way to separate a magnetic material (iron filings) from a non-magnetic material (sand). - Use a screen to sift and separate the big pieces from smaller pieces. – Sand and gravel
Explanation: A screen or sieve is used to separate materials of different sizes. Gravel particles are larger than sand particles, so a screen with appropriate mesh size will allow the smaller sand particles to pass through, while the larger gravel particles are retained on top. - Pick out the bigger particles. – Sand and wood shavings
Explanation: In this case, the larger wood shavings can be manually separated from the finer sand particles. This method requires physical intervention to pick out the larger particles, which would be more noticeable compared to the smaller sand particles. - Add water and float one type of particle. – Gravel and rocks
Explanation: Adding water can make the denser material (rocks) sink, while the less dense gravel particles may float. This separation method utilizes differences in density between the two materials.
Each of these methods is based on the physical properties of the substances in the mixtures, such as solubility, magnetism, particle size, and density. These techniques are often used in various scientific, industrial, and everyday contexts to isolate and separate different components of mixtures.