Q: What are materials that are good conductors of thermal energy called? Read this paragraph and choose the correct option from the provided answers: Conduction is usually faster in liquids and certain solids than in gases. Materials that are good conductors of thermal energy are called thermal conductors . Metals are excellent thermal conductors. They have freely moving electrons that can transfer energy quickly and easily. That's why the metal pot in Figure above soon gets hot all over, even though it gains thermal energy from the fire only at the bottom of the pot. In Figure below , the metal heating element of the curling iron heats up almost instantly and quickly transfers energy to the strands of hair that it touches. Choices: - reflective conductors - atmospheric conductors - geospatial conductors - thermal conductors A:
thermal conductors

Q: The cells of what basic plant structure lack chloroplasts? Read this paragraph and choose the correct option from the provided answers: Choices: - leaf - stem - ferns - root A:
root

Q: Echinoderms have what type of body symmetry? Read this paragraph and choose the correct option from the provided answers: Echinoderms are marine organisms that make up the phylum Echinodermata. They can be found in the ocean from the equator to the poles. There are roughly 6000 living species of echinoderms. They are among the most distinctive organisms within the animal kingdom. Members of the phylum include sea stars (starfish), sand dollars, and feather stars, shown in Figure below . See "Different But Equal" at http://www. pbs. org/kcet/shapeoflife/episodes/ultimate. html for an introduction to echinoderms. Choices: - Translational symmetry - Rotational symmetry - Reflectional symmetry - radial symmetry A:
radial symmetry