Science Knowledge Challenge

What is the layout of the periodic table?

• The layout of the periodic table is organized by the size of the elements

• The layout of the periodic table is organized in alphabetical order

• The layout of the periodic table is organized in rows and columns, with elements arranged in order of increasing atomic number, and divided into periods and groups.

• The layout of the periodic table is organized by the color of the elements

What are the symbols of the first 20 elements in the periodic table?

• H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, X

• H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca

• H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, Kr

• H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Co

Name one common use of oxygen.

• Fuel for cars

• Ingredient in baking

• Building material

• Medical treatment

What makes hydrogen unique compared to other elements?

• Hydrogen's weight and rarity make it unique compared to other elements.

• Hydrogen's simplicity and abundance make it unique compared to other elements.

• Hydrogen's instability and scarcity make it unique compared to other elements.

• Hydrogen's complexity and scarcity make it unique compared to other elements.

What are the physical properties of metals?

• Low electrical and thermal conductivity, dullness, brittleness, and rigidity

• Medium electrical and thermal conductivity, transparency, flexibility, and fragility

• High electrical and thermal conductivity, luster, malleability, and ductility

• No electrical and thermal conductivity, opacity, hardness, and inflexibility

What are the physical properties of non-metals?

• Brittle, poor conductors of heat and electricity, low melting and boiling points, and dull appearance

• Hard, average conductors of heat and electricity, moderate melting and boiling points, and metallic appearance

• Flexible, excellent conductors of heat and electricity, high melting and boiling points, and glossy appearance

• Malleable, good conductors of heat and electricity, high melting and boiling points, and shiny appearance

What are the physical properties of metalloids?

• Metalloids have properties that are intermediate between metals and nonmetals, such as semi-conductivity and varying degrees of luster.

• Metalloids are highly reactive with water and air

• Metalloids have no electrical conductivity

• Metalloids are always in a gaseous state at room temperature

What is the definition of motion?

• Motion is the speed of an object

• Motion is the state of being at rest

• Motion is the change in color of an object over time

• Motion is the change in position of an object over time.

Name two types of motion.

• Linear motion and rotational motion

• Rectilinear motion and curvilinear motion

• Circular motion and oscillatory motion

• Translational motion and vibrational motion

What is a balanced force?

• No force acting on an object

• Two unequal forces acting in the same direction on an object

• A single force acting on an object

• Two equal forces acting in opposite directions on an object