# On the Level

Explore the relationship between gravity, pressure, and the flow of liquids!

Curriculum Topics: Pressure, Potential and Kinetic Energy; Properties of Liquids

### Standards

Idea Sheets are cross-referenced to subjects listed in the Common Core, Next Generation Science Standards, and California Content Standards.

Plan and conduct an investigation to provide evidence of the effects of balanced and unbalanced forces on the motion of an object. ||Next Generation Science Standards||Grade 3||Physical Science||Motion and Stability: Forces and Interactions |||Make observations and/or measurements of an object’s motion to provide evidence that a pattern can be used to predict future motion. [Examples: a child swinging in a swing, a ball rolling back and forth in a bowl, and two children on a see-saw.] “||Next Generation Science Standards||Grade 3||Physical Science||Motion and Stability: Forces and Interactions |||Develop a model to describe that matter is made of particles too small to be seen. [ Examples: adding air to expand a basketball, compressing air in a syringe, dissolving sugar in water, & evaporating salt water.]||Next Generation Science Standards||Grade 5||Physical Science||Matter and its Interactions|||Support an argument that the gravitational force exerted by Earth on objects is directed down.||Next Generation Science Standards||Grade 5||Physical Science||Motion and Stability: Forces and Interactions|||Develop models to describe the atomic composition of simple molecules and extended structures||Next Generation Science Standards||Middle School||Physical Science||Matter and Its Interactions |||Plan an investigation to provide evidence that the change in an object’s motion depends on the sum of the forces on the object & the mass of the object.||Next Generation Science Standards||Middle School||Physical Science||Motion and Stability: Forces and Interactions

1.g. Properties of solid, liquid, and gaseous substances, such as sugar (C6H12O6), water (H2O), helium (He), oxygen (O2), nitrogen (N2), and carbon dioxide (CO2).||CA Science||Grade 5||01. Physical Sciences||1. Elements and their combinations account for all the varied types of matter in the world.|||2.b. When an object is subject to two or more forces at once, the effect is the cumulative effect of all the forces.||Grade 8||01. Physical Sciences||2. Forces||2. Unbalanced forces cause changes in velocity.|||2.d. How to identify separately two or more forces acting on a single static object, including gravity, elastic forces due to tension or compression in matter, and friction.||Grade 8||01. Physical Sciences||2. Forces||2. Unbalanced forces cause changes in velocity.

Categories include:
• Physical Science