Nandito Ako!
What is a pure substance?
A) A material made of two or more different substances
B) A material that cannot be separated into simpler substances
C) A mixture of solids and liquids
D) A substance that changes its state easily
B) A material that cannot be separated into simpler substances
If you have a mixture of iron filings and sawdust, which physical property would be best to separate them, and what process would you use?
Use of magnets or Magnetism
What role do mixtures play in cooking?
A) They make food unhealthy
B) They prevent food from being cooked
C) They are never used in cooking
D) They allow for the combination of flavors and textures
D) They allow for the combination of flavors and textures
What type of mixture is formed when sugar is dissolved in water?
A) Heterogeneous mixture
B) Homogeneous mixture
C) Pure substance
D) Compound
B) Homogeneous mixture
What method would you use to separate a mixture of sand and water?
Filtration
Why is understanding mixtures crucial for environmental science?
A) It helps in understanding pollution and waste management
B) It is not important at all
C) It complicates environmental issues
D) It has no relevance to ecosystems
A) It helps in understanding pollution and waste management
What is the main difference between a compound and a mixture?
B) Compounds are made of two or more elements chemically combined; mixtures are not
How could separate a mixture of oil and water? What principle does this separation rely on?
Decantation
How can the separation of mixtures benefit industries?
A) It makes products less useful
B) It increases waste production
C) It helps in recycling materials
D) It has no impact on industries
C) It helps in recycling materials
Which of these statements is true about mixtures?
A) Mixtures have a fixed composition
B) Mixtures can be separated by physical means
C) Mixtures always appear uniform
D) Mixtures are always solid
B) Mixtures can be separated by physical means
Why are mixtures important in everyday life?
A) They are always harmful
B) They can be separated into their components
C) They can only be found in laboratories
D) They do not exist in nature
B) They can be separated into their components
Which method is NOT effective in minimizing risks associated with harmful mixtures?
A) Proper labeling and storage.
B) Using protective equipment when handling them.
C) Educating others about the dangers.
D) Mixing different chemicals to see their reactions.
D) Mixing different chemicals to see their reactions.
Why is it important to read labels on chemical products?
A) To find out how much they cost.
B) To see if they are on sale.
C) To understand the ingredients and potential hazards.
D) To know how to mix them
C) To understand the ingredients and potential hazards.
What should you do if you accidentally ingest a harmful substance?
A) Call poison control or seek medical help immediately.
B) Drink water and wait.
C) Try to make yourself vomit.
D) Ignore it if you feel fine.
A) Call poison control or seek medical help immediately.
If you were to separate a mixture of gravel and pebbles, which method would you choose?
Physical manipulation or sieving
During a cooking class, you accidentally mixed flour and sugar. What practical method can you use to separate them?
Sieving
Sara is making lemonade by mixing water, lemon juice, and sugar. After stirring, the sugar dissolves completely. What type of mixture is Sara creating?
Homogeneous Mixture
Which of the following is a characteristic of a heterogeneous mixture?
A) It has a uniform composition
B) Its components can be easily distinguished
C) It cannot be separated by physical means
D) It is a pure substance
B) Its components can be easily distinguished
How can we minimize the risks associated with harmful chemical mixtures in the home?
A) Storing them in a locked cabinet.
B) Mixing them together to see what happens.
C) Leaving them out in the open for easy access.
D) Using them without any protective gear.
A) Storing them in a locked cabinet.
In a science experiment, you accidentally mixed salt into a bowl of water. If you want to separate the salt from the water, what method would you choose?
Evaporation
In a cooking class, a recipe calls for a mixture of flour, sugar, and cocoa powder. After mixing, the ingredients appear uniform. What can be inferred about this mixture?
Homogeneous Mixture
You find a mixture of plastic and metal scraps in a recycling bin. What method would you use to separate these materials, and what might be the environmental impact of improper separation?
Use of magnets
What is the name of the process used to separate components of a mixture based on differences in boiling points?
Distillation
During a science fair, you accidentally mix different colored inks. What method would you use to separate these inks?
Chromatography
During a science experiment, Emily mixed sand, salt, and water in a beaker. After stirring, she noticed that the salt dissolved, but the sand settled at the bottom. What type of mixture did Emily create?
Heterogeneous Mixture