FIRST QUARTER EXAM-SCIENCE 7

1. What is the main purpose of a scientific model?

• To collect data

• To explain and predict phenomena

• To replace experiments

• To solve mathematical problems

It is considered as a step-by-step process of solving a problem.

• Scientific Model

• Scientific Calculator

• Scientific Method

• Scientific Problem

A 3D model of the Banaue Rice Terraces can be used in studies to understand water flow and soil erosion. What kind of scientific model is this?

• Physical model

• Conceptual model

• Mathematical model

• Simulation model

What is a solution?

• A combination of any two substances

• A homogeneous mixture of two or more substances

• A mixture that always contains water

• A mixture where one substance sinks to the bottom

In a saltwater solution, what is the solute?

• Water

• Salt

• Both salt and water

• Neither salt nor water

A solution that contains less solute than it can theoretically hold at a given temperature is called:

• Saturated

• Supersaturated

• Unsaturated

• Concentrated

Which term refers to a substance that gets dissolved? Ang matunaw.

• Solvent

• Solute

• Solution

• Solubility

A scientist is using a model to predict sea level rise. What type of model is likely being used?

• Conceptual model

• Mathematical model

• Economic model

• Social model

What is the first step in the scientific method?

• Make an observation

• Ask Questions

• Formulate hypothesis

• Draw conclusion

Which of the following is a correctly stated hypothesis?

• Water boils at 100°C.

• If plants receive more sunlight, then they will grow taller.

• Earth revolves around the sun.
  

• Gravity pulls objects towards the Earth.