Students will be able to use their critical thinking skills and to answer open-ended and multiple choice questions on topics such as conservation of natural resources, renewable and non-renewable resources, and the 3R's (Reduce, Reuse, and Recycle). The PDF document contains 20 unique task cards in color and black and white and a recording sheet. It also contains an answer key. These task cards can be used for science centers, small group instruction, whole class game, test review, time filler